Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dccd26f93000a26…

MALICIOUS

PDF

72.9 KB Created: 2021-09-08 16:10:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 763b4fbae591f370830462d1736b7adb SHA-1: 4cb5816d921d8fb1386b10025f128955e0d2c7b8 SHA-256: 6dccd26f93000a266e5afdc035308d791b4081fa4e158e8a83ec0abf30107423
156 Risk Score

Malware Insights

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

The PDF was flagged by ML and ClamAV as malicious, exhibiting characteristics of a phishing or malware distribution lure. It contains a link farm pointing to multiple disposable or compromised domains, suggesting an attempt to redirect users to malicious content. The presence of numerous unknown URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly indicate a malicious intent to host or link to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://amphorabeautyclub.com/campannas/file/fejedawuzadenafojunobux.pdf In PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16131523f6e467---gupunuzuvusiwij.pdfIn PDF document text
    • http://gzperson.com/uploadfile/files/38670825743.pdfIn PDF document text
    • http://architettoletiziamasciotta.eu/userfiles/files/negutidusozorumoliw.pdfIn PDF document text
    • https://megatekspb.ru/sites/default/files/uploads/towomenaliweratuka.pdfIn PDF document text
    • https://akrmedia.no/ckfinder/userfiles/files/lojumojotixofisun.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/83860427877.pdfIn PDF document text
    • https://tectrongim.com/uploads/file/towoxumotuzer.pdfIn PDF document text
    • http://portableandcool.com/files/files/63724284962.pdfIn PDF document text
    • https://wanna-drive.nl/files/File/18945503038.pdfIn PDF document text
    • http://guides2alpes.org/uploads/file/firatozezipejesit.pdfIn PDF document text
    • http://rotang.net/userfiles/file/futetidesadetotuwa.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/16133ede28ad2f---wekizakonetegutupotik.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131abdfb9ace---21456538447.pdfIn PDF document text
    • https://eastmanllc.net/ckfinder/userfiles/files/zulurevapimugefonagiz.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131db369cae4---20335721863.pdfIn PDF document text
    • http://xn--oy2b19v1mb1yi.com/userfiles/file/pinodexatupimifiluwibegoz.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/161344d3a1cebe---51932955477.pdfIn PDF document text
    • http://vanprodukt.cz/UserFiles/File/dajopojakuwagizoxa.pdfIn PDF document text
    • https://hoavily.com/uploads/files/47522852179.pdfIn PDF document text
    • http://bargiel.com.pl/ckfinder/userfiles/files/xovosofigubozilo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=ridgid+1233+threading+machine+manualPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b5e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cdfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDFA 11016 bytes
SHA-256: 334e9896c45f95d2d8eac4269ebfdbbe07304045f6908b0f244db78fe7bb1662
font_02_sfnt_off0000e740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE740 17380 bytes
SHA-256: f3885b08187a59f16d6716db4744c78a5f53448af2386396c35731ac258e7660