Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ed970e87ee6295e…

MALICIOUS

PDF

91.6 KB Created: 2021-06-26 09:04:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 54a36f781500c73b05c6715093ac64c0 SHA-1: 471e8bdab68ef3dc400aab6b083600524172f741 SHA-256: 8ed970e87ee6295e976b8f610ffa76bae82af413be477f8bbee6ff10a1b1d24b
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. The 'SE_CALLBACK_LURE' heuristic indicates the document is designed to trick the user into calling a phone number, a common tactic in callback phishing and tech-support scams. While no scripts were explicitly extracted, the PDF structure and numerous embedded URLs pointing to potentially compromised websites suggest an attempt to host malicious content or redirect users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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
  • 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.
  • 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://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/467652958ab5d05d10555aa318348c71/tikumuvanenegagipifalofes.pdf
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/8aa37311a9eb16ad045b53bd7699faef/xuxudegikatanukepemux.pdf
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/b6e797ac9fcb5c0e97b5519e53be1437/kitoxij.pdf
    • http://urbanconstructions.org/images/uploadedimages/file/lixokapudugi.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16096765fdff05---pawopadigojovukofug.pdf
    • https://chp-travel.ir/data/file/wokalajujosojumupiz.pdf
    • http://amoy-art.com/Upload/file/59584361077.pdf
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607490f71872d---22996394417.pdf
    • https://avela.md/userfiles/file/23676267253.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ad69b7dd9---60380115892.pdf
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/cc3a6b139d1fe603545d17a9a31a9075/vopumuzelevunixuvimaruv.pdf
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/cfoumm3sh6hol9ogc6ld7bo415/27684775398.pdf
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/69055974157.pdf
    • http://yule-sign.com/upload/editor/file/20210603195525.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607d22345a1e2---71571138649.pdf
    • http://vytvarnyobchod.cz/UserFiles/File/39321267151.pdf
    • http://short-story.ru/upload/file/mudadutuwusago.pdf
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080cd53ca402---fapikawuvokaz.pdf
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/d7d8c4a2dcea3b4859c9558f27647f5c/12385613745.pdf
    • http://resetimpianti.it/reset/public/file/43961795084.pdf
    • http://abovomedia.hu/_user/file/54550758105.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aad5bebad29---redusuna.pdf
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/f2312d76d744c605a77fec71c049f2ba/weginebukifenoxojujeb.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=omni+cleansing+softgel+directions
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eab2.bin
bfc7ce51a1a9b37382af61f0075eb0cdb972126da031002d338643432d80e6e4
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB2 16252 bytes
font_01_sfnt_off00010092.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10092 16792 bytes
font_02_sfnt_off000118a4.bin
f11ff074d1ee24e08d3e3aeab6df2f5aef1e320a08aa62a01b3472c81b1fada1
pdf-font-stream PDF embedded font (sfnt) at offset 0x118A4 18008 bytes
font_03_sfnt_off00014828.bin
83ccbd257be0331943740a09412bc28f3292844c4aba555431fbdb12f7e45091
pdf-font-stream PDF embedded font (sfnt) at offset 0x14828 10844 bytes