Malicious PDF — malware analysis report

Static analysis result for SHA-256 e204d9b0f50e71c0…

MALICIOUS

PDF

71.9 KB Created: 2021-10-03 14:06:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 9637a876ab97abe36974489d3d1b0160 SHA-1: 66b3fc7e32c6c1f85691db7de1c11a6bc3adfd38 SHA-256: e204d9b0f50e71c0c80cce0f7ca8a03feabf7827e99c5aaa61d134b9bc1f0cf0
176 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded links, including one pointing to a raw IP address and others hosted on compromised WordPress sites, suggesting a phishing or malware distribution campaign. No scripts were extracted, but the presence of many external links indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://bednidhitraders.com/userfiles/file/36548104830.pdf In PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/161325a11af44c---65510486097.pdfIn PDF document text
    • http://moiarchitekci.pl/pliki/file/84950433957.pdfIn PDF document text
    • https://resulgame.com/calisma2/files/uploads/15673833394.pdfIn PDF document text
    • http://185.33.116.142/~bbyacht01/upload/files/zotajeveba.pdfPDF link annotation
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16141c5eb5b39b---gatobiwu.pdfIn PDF document text
    • http://hoteldanang.vn/uploads/images/files/8926542965.pdfIn PDF document text
    • http://cmtl.in/uploads/userfiles/file/file/2764065839.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/wibikibajibizasoje.pdfIn PDF document text
    • http://www.huntsvillepr.com/files/files/40235930647.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/70814745dc24c1bcc5a8786e0379e7c3/47963443373.pdfIn PDF document text
    • http://101balkon.ru/upload/files/lumuf.pdfIn PDF document text
    • http://synphabase.ch/upload/file/1252664164.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/e6k4qrc7jrdp3csrt7k5tgel14/14855020659.pdfIn PDF document text
    • https://www.sudicobank.com/ckfinder/userfiles/files/70513003811.pdfIn PDF document text
    • https://xyoaa.org/sites/default/files/files/wenorapopekobazexob.pdfIn PDF document text
    • http://nghieuphong.com/upload/files/kafoziwoxevas.pdfIn PDF document text
    • http://pop-around.com/file_media/file_image/file/xasadebubev.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/c0ee833dcb467240acc7132195840466/78368740673.pdfIn PDF document text
    • http://anipetkingdom.com/webroot/img/files/pedudubafo.pdfIn PDF document text
    • http://giprozdraw.ru/ckfinder/userfiles/files/93270747010.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161311fe4c4785---nixomegogigebadamugi.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146e108c4fa0---kixozowawugopova.pdfIn PDF document text
    • http://uzks.hr/upload/datoteke/wepazaxemudigugumunegefuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=baked+onion+ringsPDF 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_off0000b67a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB67A 17504 bytes
SHA-256: fef30008c320616484d6403e29bf876cb05a7c2ef763072ebc28502a7a7ffcf2
font_01_sfnt_off0000e30b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30B 10424 bytes
SHA-256: 72539722c642407cae20a0f78f40de46dce8cb8490a91ddb5c734fc58a15d7ee
font_02_sfnt_off0000fa93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1