Malicious PDF — malware analysis report

Static analysis result for SHA-256 32ad207913fb2981…

MALICIOUS

PDF

96.2 KB Created: 2021-06-09 22:59:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: c1e452319b722be483aca9db5f795e9d SHA-1: 5efabbc71fab43bca862e040f32ce911b369a851 SHA-256: 32ad207913fb298155d7f37c0703ca4afb720047d2ad40f9865c3b10347067be
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://chcial.ru/uplcv?utm_term=gta+5+human+verification+apk PDF link annotation
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d026a0b7ae---33589873162.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/nen6ltpotgfcelj9f7th29kce0/75580822713.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608fbde74c2d0---letop.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/wurojamagadojuwata.pdfIn PDF document text
    • https://airbays.com/userfiles/file/nufomigepamomafurafegova.pdfIn PDF document text
    • http://tutek.eu/userfiles/file/18422547722.pdfIn PDF document text
    • https://supermagnum-bg.com/userfiles/file/velebijoz.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/85862423329.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/c72d81e9d43ee7b6ac67ede21f39794f/zajiriwarezatopeno.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609fdf37591a8---96979885259.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160700ed7b6b0d---39073052989.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/e594a207bfaec359ba2c010134a338a7/mokusonuresuxisogi.pdfIn PDF document text
    • https://lacecinella.com/writable/public/userfiles/file/mukavive.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160831a7bb4479---rufokevowiki.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a869aa4e58e---latujekonegasuxezumine.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b35eada584e---vogatelule.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/deropopupomid.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0619455d57---79937028342.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedorahosted.org/lohitIn 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
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000141a6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x141A6 17068 bytes
SHA-256: ba2d791f6c776824bd3587b266395ffaee3a468e4fb84f3fa4cfc40f06a95f82
font_00_sfnt_off0000f77c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF77C 5220 bytes
SHA-256: a063f1f87f00aadfea279c441a6993556e1b20904c69e2b0ad4bd2e45a27484b
font_01_sfnt_off00010990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10990 5204 bytes
SHA-256: faff2349c09342d890ea198afbef7ecbb2a7eb8c42e1f253740fedb967281e37
font_02_sfnt_off00011b2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B2F 11932 bytes
SHA-256: 53e19ca2f37d19394e6d3aec5ff3289c18fea83f3496ea27e3c734fbb1559057
font_04_sfnt_off000159b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159B7 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
font_05_sfnt_off000167b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167B7 2620 bytes
SHA-256: 90a62e56f93910a47f085670775aef0ad786fc4eac13ab46f93169da4c5deefb

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