Malicious PDF — malware analysis report

Static analysis result for SHA-256 d34d5803d182ada6…

MALICIOUS

PDF

72.0 KB Created: 2021-09-15 14:23:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 74d3d62d39fb0b8fd313703569d8fc7d SHA-1: b270cc2ff6c1ce01090a7ced231643215de2360c SHA-256: d34d5803d182ada6e6f50782853f51a5d636ce708035759af51adb546eb416be
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://allytemp.ru/uplcv?utm_term=pokemon+mystery+dungeon+gates+to+infinity+rom+download PDF link annotation
    • http://grandioso.asia/editor_upload_image/file/basafi.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613809ff45d8e---45021190766.pdfIn PDF document text
    • https://gaadalagi.com/contents/files/96988427825.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/ll5epu3mu7uiin772943oashjh/totabinolavalogezemogaf.pdfIn PDF document text
    • http://zaintik.org/files/galeria/files/95402151174.pdfIn PDF document text
    • http://cjpharmtech.com/upload/files/palipelajakolunizuved.pdfIn PDF document text
    • http://vibestedu.com/_UploadFile/Images/file/83758192477.pdfIn PDF document text
    • http://mim2010.ru/userfiles/file/67101771154.pdfIn PDF document text
    • http://countryclaim.cz/userfiles/file/48592132426.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/9ce9cf9a5be6f43fc396dfc1d0c0e390/bowurifu.pdfIn PDF document text
    • https://patidarpalanpur.com/web/k/main_admin/ckfinder/userfiles/files/garufumato.pdfIn PDF document text
    • http://wumag.pl/userfiles/file/8978087454.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613a152c2f0dc---63155253045.pdfIn PDF document text
    • https://samsungklimalar.com/upload/ckfinder/files/jokizanoweme.pdfIn PDF document text
    • http://njxinbell.com/upload/files/67692622582.pdfIn PDF document text
    • http://teedinmaesai.com/user_img/file/99922215281.pdfIn PDF document text
    • http://hcbarrett.com/user_area/file/19278705266.pdfIn PDF document text
    • http://abwingsde.com/uploads/files/6460313304.pdfIn PDF document text
    • http://unitec-egypt.net/userfiles/file/fujezexosanob.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/v0hia9895rno83qou6l3t3mgt2/sepenonesisusamaxiton.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_off0000b465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB465 16956 bytes
SHA-256: bb0650dfa554e38099f786b4d395e25ee1953872ee48db57763c1758ca12c815
font_01_sfnt_off0000dfeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFEB 11092 bytes
SHA-256: e09c832a61fc0527fd5e48d8ea95c9cefc2cddcc60d9a30a0eb81284cc63980a
font_02_sfnt_off0000f9ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1