Malicious PDF — malware analysis report

Static analysis result for SHA-256 e15f138383897fdc…

MALICIOUS

PDF

75.2 KB Created: 2021-09-10 04:51:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ae97dba91652c67627554c6d76235582 SHA-1: 9eee6c2de29d3b9e0dbf254f89707212917497a8 SHA-256: e15f138383897fdc3486f4d2042d067d39348ee53f059b141b24ded52495f84c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing or trojan distribution. It functions as a link farm, with numerous embedded URLs pointing to compromised websites and disposable hosting, likely to lure users into downloading malware or falling victim to phishing schemes. The presence of external URI heuristics and link farm indicators strongly suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://irlanc.ru/uplcv?utm_term=amazon+prime+mod+apk+download+for+android PDF link annotation
    • http://hangquangauto.com/files/dejupovuxapa.pdfIn PDF document text
    • https://raljob.com/userfiles/file/pufunimedewoxizoxeral.pdfIn PDF document text
    • https://cochleartudaskozpont.hu/files/bipekalarezefowiveki.pdfIn PDF document text
    • http://schule.havonix.com/ckfinder/userfiles/files/7358698154.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16130e95cd5ac2---wesosafazomobaduz.pdfIn PDF document text
    • http://studionegro.net/userfiles/files/71086567533.pdfIn PDF document text
    • https://rais.bg/uploads/file/xibodotexi.pdfIn PDF document text
    • http://szkolaprywatnaleszno.pl/userfiles/file/77347463878.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16130cc870fd68---wugenalevageboki.pdfIn PDF document text
    • http://graciaindoutama.com/kingkong/userfiles/files/dapinunol.pdfIn PDF document text
    • http://mimarkamilozkartal.com/userfiles/files/suvakirazitomutipej.pdfIn PDF document text
    • https://www.corpeverest.com/ckfinder/userfiles/files/kizobadefut.pdfIn PDF document text
    • https://luckysurface.itweald.com/uploads/files/6134e850ac6ad.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613093a56d7f3---49178332249.pdfIn PDF document text
    • https://turbooto.vn/upload/files/xomidelenumatam.pdfIn PDF document text
    • http://sedaciesupravy.sk/media/file/16828908329.pdfIn PDF document text
    • https://samudra99.com/contents/files/somikogibilete.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/40sph3e9djr5757epo01okfbvj/7897513181.pdfIn PDF document text
    • https://granitnet.hu/editor_up/nujoxafawosevosix.pdfIn PDF document text
    • http://pensjonatagat.pl/userfiles/file/gawatapuren.pdfIn PDF document text
    • https://rafaellopezehijo.com/upload/files/debibixaperodoxiz.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136be9ce4a5f---105846754.pdfIn PDF document text
    • http://flashdisplay.net/UploadFiles/FCKeditor/20210903044309.pdfIn PDF document text
    • 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_off0000bf8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF8B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d7a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A2 10612 bytes
SHA-256: 9d19578a3fcde449acd16a678b49d9392712d1a19271ac906cdf787fa06da352
font_02_sfnt_off0000efe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE2 18076 bytes
SHA-256: 4d830fa8476838de3da8caaf1e80a99c33efbbb74f132b15a17b3634243a584d

Open this report in the interactive analyzer, or submit your own file for analysis.