Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd9474800488d8d7…

MALICIOUS

PDF

84.2 KB Created: 2021-09-11 18:52:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b71c7498504378f74f14c67eabbe33be SHA-1: cb3f810ab7ad89eacbce1be33f7d23945c0ccacf SHA-256: bd9474800488d8d7a9725b678549f267d6e86a3331e05ac563f212daaa365ee3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to potentially compromised websites and disposable hosting, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://drafthe.ru/uplcv?utm_term=guitar+pro+ios+free PDF link annotation
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/8s0057clvvsb5i5dqdket4ovaa/bejexajolavobege.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161382fea2a21e---31172070050.pdfIn PDF document text
    • http://domkomplekt34.ru/attachments/file/xifagagopewelag.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/75047018001.pdfIn PDF document text
    • https://cmflower-kkc.com/ckfinder/userfiles/files/9080630866.pdfIn PDF document text
    • http://asesoriazabalburu.org/azaba/files/file/wumafurujofakot.pdfIn PDF document text
    • http://icoenergia.com/userfiles/files/kedumukovujerutur.pdfIn PDF document text
    • http://retailcop.ca/files/19413114378.pdfIn PDF document text
    • http://dohertylaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/45785165542.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/uj18c273kugihilmp5ljjibtkj/zufevepam.pdfIn PDF document text
    • https://zlatartopalovic.rs/files/jowizorotowozupukodopa.pdfIn PDF document text
    • http://bjsixiang.com/jingkelun/userfiles/files/20210904000033.pdfIn PDF document text
    • https://voyageaventurenepal.com/upload/files/77902805364.pdfIn PDF document text
    • http://tyros-club.de/userfiles/file/guvezitukisumubi.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b244c818d3---67899524699.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/karizevobi.pdfIn PDF document text
    • http://klawiatury-foliowe.pl/_data/file/zotilenabuganujaxabu.pdfIn PDF document text
    • http://aven.su/userfiles/file/nuguxuz.pdfIn PDF document text
    • https://securitydm.eu/slicice/file/41748610450.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/e43e24c2c02061472ff8cce5573947c6/varifogevepiwiver.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ee2ec15cc7---45995957454.pdfIn PDF document text
    • http://sbcnepal.com/images/file/wazikilegewonemizogum.pdfIn PDF document text
    • https://szamitogep-szerviz-javitas.hu/ckfinder/userfiles/files/tinemimoduvaluxememuge.pdfIn PDF document text
    • https://uangraja.com/contents/files/rigajobo.pdfIn PDF document text
    • http://tangiahoang.vn/Images_upload/files/fijewas.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_off0000e3bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BC 18388 bytes
SHA-256: 2e36b48e9532115693a03f5c250bcb261a91af9ad0b37cc20d2c4a1ea3a81de7
font_01_sfnt_off000113dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012bf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BF4 10340 bytes
SHA-256: f42af1187ac64030b9da917ac0610078fb8f388b53e930e087767f554746c068

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