Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c6e650c6852143a…

MALICIOUS

PDF

103.6 KB Created: 2021-07-18 14:42:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: cb1b12a5cff7c1183428e0dbce5f28c9 SHA-1: ac46ed8c2b03f454aacfebb77591661d3ccf81e5 SHA-256: 4c6e650c6852143a8777447949f10661d486368c1a2d9a46b70c16a1c1ed90cc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised CMS upload directories, suggesting it functions as a link farm designed to redirect users to malicious or phishing sites. The presence of multiple distinct hosts and the use of UTM parameters further support the link farm and potential SEO manipulation or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9747

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/4acb6b417c7c03e1043f0bc1cfb1b86c/mozilebofe.pdf In PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce798ba24d---disenonevuveno.pdfIn PDF document text
    • https://businesslife.com/content/files/39053685628.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c701cf97c---28853048588.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/unlnid1m45jkrd9570qdv78j46/nozolisopozugujop.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3ce08a0c0---63842534541.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce0449d4f3---tijeda.pdfIn PDF document text
    • https://napraforgohotel.hu/upload/file/8092254663.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/goxifepezabam.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160912e5bba815---27500586542.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16078079586464---75534327568.pdfIn PDF document text
    • https://banghenails.com/upload/file/40559963056.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4c22727ba---rexuburatarikugatomene.pdfIn PDF document text
    • http://www.lnk-creation.fr/upload/file/43801653533.pdfIn PDF document text
    • https://securitegenerale.tn/userfiles/file/gowapisawoverubukokavag.pdfIn PDF document text
    • http://darec.sk/files/files/gigovibesenuge.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607caee7e499a---divogezekafuvizi.pdfIn PDF document text
    • https://samarthanamparisara.org/apadmin/uploads/userfiles/files/97797476375.pdfIn PDF document text
    • http://starlightcelebre.com/clients/4/43/43e9139217482d7666ce300faf566241/File/tokigozatokizunuvuride.pdfIn PDF document text
    • https://mut-zur-veraenderung-hambuch.de/userfiles/file/11290420659.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c851909f373---nanimun.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/1i3m2vq19r7gsgq3o694rj5ch7/mawuwuzakareli.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/gelenatagatemezinab.pdfIn PDF document text
    • http://youngshiny.com/userfiles/file/1625629045.pdfIn PDF document text
    • http://hk-dcc.com/wp-content/plugins/super-forms/uploads/php/files/vanrtfte38piauprvt6kk7ligt/49777938214.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=definition+of+a+constituentPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00016e04.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16E04 19636 bytes
SHA-256: 62b6491b261b5f0f9cedb68a857f34858693066ed34ad1e3d66eedd8c39da96b
font_00_sfnt_off0000f411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF411 24632 bytes
SHA-256: b959743c0f8dde55db17c8022b3bd15ebc90bc61c51a9322780de9ffc7f12bd9
font_01_sfnt_off00012f0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F0E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14725 10284 bytes
SHA-256: ffdc11db8250c244c589c62e27e51791e43032b5e2869123cb5cbb5f4fe903ec
font_03_sfnt_off00015e6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E6E 4228 bytes
SHA-256: c8ce94db0e7b84126a405f14efa6e1b53e056c4d9d901f725247e947f44375dc

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