Malicious PDF — malware analysis report

Static analysis result for SHA-256 970c208f61073e6c…

MALICIOUS

PDF

82.0 KB Created: 2021-09-17 14:57:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4b47da13dfbaf040dab19783384973cc SHA-1: 9570e072bf26b1e7462b809c81ee15d3aaef3b0c SHA-256: 970c208f61073e6c44faf5049852f2ed27859dc929ae5094c13a8385e435ee88
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external sites, many of which are hosted on compromised or disposable domains, suggesting a link farm designed to distribute malware. The presence of a 'download button' lure and callback phishing indicators further supports a malicious intent. ClamAV detection and ML classification confirm the malicious nature of the file, likely acting as a downloader for further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pistant.ru/uplcv?utm_term=shareek+movie+download+720p PDF link annotation
    • https://psg66.ru/admin/ckfinder/userfiles/files/gojofodemug.pdfIn PDF document text
    • https://producedepot.us/userfiles/files/36441689860.pdfIn PDF document text
    • http://cheers-gifts.com/userfiles/bazapesozazonif.pdfIn PDF document text
    • http://degrossier.nl/uploads/file/69333869759.pdfIn PDF document text
    • https://villamishkan.com/310renonew/front/images/files/totetonit.pdfIn PDF document text
    • http://gr-chem.com/upload/files/85008909926.pdfIn PDF document text
    • http://worshipedia.mobi/sites/default/files/file/25987780859.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161301c47ecc17---50380584960.pdfIn PDF document text
    • http://interwork.sk/userfiles/file/weteguriteda.pdfIn PDF document text
    • http://snnet.kr/board_pds/fckeditor/2021/09/file/dexerixelimusovunu.pdfIn PDF document text
    • http://ourdesign.hk/ckfinder/userfiles/files/35362662830.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/sec2hhk6lvlk87rto30o46od23/42673087344.pdfIn PDF document text
    • http://hiroshima-teishaku.com/userfiles/file/98320209776.pdfIn PDF document text
    • http://produse-zilan.ro/files/54135418040.pdfIn PDF document text
    • http://interface-referencement.com/userfiles/file/pujebarifuvosujugus.pdfIn PDF document text
    • https://shunnasato.com/75837836837.pdfIn PDF document text
    • http://faurerom.com/userfiles/file/vutigomisiwaxuza.pdfIn PDF document text
    • http://www.octopus-quatuorvocal.com/ckfinder/userfiles/files/77323108064.pdfIn PDF document text
    • http://kramnyca.info/img/upload/editor/file/46891928000.pdfIn PDF document text
    • https://zakarpattya-tour.com/upload/kimafoverobuj.pdfIn PDF document text
    • http://smalternatywa.pl/media/upload/files/a70134bb01116b258f30494a4865dd29.pdfIn PDF document text
    • http://tznjl.com/userfiles/files/76852877171.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613f7611a9cac---rabamubalogogazo.pdfIn PDF document text
    • https://maxlinder.com/admin/assets/ckfinder/userfiles/files/52952147370.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_off0000dca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B9 11004 bytes
SHA-256: 967e8b7e9dab3849e66c54ae4129d29b92c55d13eb99fde103a76ca73e65bd92
font_02_sfnt_off00010e26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E26 17368 bytes
SHA-256: ea7e5d5bf7a96ccb67e5e2714a69a5875c9896bea6d0070652260d70bb9c13b7

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