Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd118675b08540e3…

MALICIOUS

PDF

80.9 KB Created: 2021-03-08 19:38:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 62575123e5754857e4a6624977c62418 SHA-1: 12f2f2420e4d7452d6d60e9977d07f3c308d6135 SHA-256: fd118675b08540e35dd005aaf752ae340bffc4e2b1e881fac2a30258e0404d27
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xajibur.ru/aws?utm_term=who+is+the+best+real+estate+agent+near+me PDF link annotation
    • https://vipomumukewa.weebly.com/uploads/1/3/0/8/130813786/6615877.pdfIn PDF document text
    • https://fafamamijusoma.weebly.com/uploads/1/3/4/3/134371196/7764573.pdfIn PDF document text
    • https://sorafenime.weebly.com/uploads/1/3/4/3/134320910/lokunililuwu.pdfIn PDF document text
    • https://lazezareb.weebly.com/uploads/1/3/4/3/134311903/6f9f0429a1.pdfIn PDF document text
    • https://powufekati.weebly.com/uploads/1/3/4/0/134012492/wugavelaxu_mawil_tasabut.pdfIn PDF document text
    • https://loxogekero.weebly.com/uploads/1/3/4/0/134040689/7ab0e296b650a.pdfIn PDF document text
    • https://mokadipubozot.weebly.com/uploads/1/3/2/3/132303064/gujudesok_bitodewex_retitij.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
    • https://uploads.strikinglycdn.com/files/ba0f80ae-747b-4ba1-a383-7567c55aa69b/mejiwoluser.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d84fe9d5-f196-4bfb-b320-3e4e93d63356/72017295688.pdfIn PDF document text
    • https://9005a25f-7293-4a73-bb0f-bc58e8c16807.filesusr.com/ugd/e3834b_7d18ad91196b43b98ad3fd742e3a4c61.pdf?index=trueIn PDF document text
    • https://e924225a-aa46-4bfc-8e56-7341551e1833.filesusr.com/ugd/54dfea_82ddcb0c567f439cb1e182b239ce3637.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/61aeb69f-8d41-493e-bea5-43e4d18cf1a5/xfinity_ref_code_s0a00.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e1b07d7-c21f-417f-8af2-046d9c5a1fdc/schwarzkopf_igora_royal_highlifts_how_to_use.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/631d36ad-f5fe-4c11-aa10-65f31019cc9e/50605304014.pdfIn PDF document text
    • https://4fcc26ae-a476-48f2-98aa-cdc5c12f4544.filesusr.com/ugd/32d0e1_af4c8b762f5c483b85f8ef43aea873cf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d341d827-84dc-41b6-9f96-fedee5b52659/cuanto_es_150_gramos_de_azucar_en_cucharadas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36d43b9e-c274-44cc-bd2f-0fe60358afd5/4466258134.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3be97a2-8108-4746-8a2b-eabdef0fb8a6/digital_marketing_evening_courses_dublin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19ac80d4-8f22-4a68-a7e0-0e0c2e1fd9e9/burger_king_grilled_chicken_sandwich_no_mayo_nutrition.pdfIn PDF document text
    • https://ccd4a2e6-63e2-4dcb-a02e-1ae1253dabcc.filesusr.com/ugd/059ff1_77ce2fde8ec3474190ee69ea8343e90a.pdf?index=trueIn PDF document text
    • https://71f68c9c-1037-483c-a0ca-f268b7ddd3c8.filesusr.com/ugd/87fdc7_f31dc44c5c2041a3864b2e1476e9d01f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/786c41bf-a9d2-49aa-9a52-21524716a776/raxafeziporigule.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF180 5040 bytes
SHA-256: 18f19db573bf35aaa8a213c80315314177c3eb00d56730cc4b6ceafdf32d70b1
font_01_sfnt_off0001027a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1027A 10972 bytes
SHA-256: a9665937238cc0ab6c2e27f5a047e5c27cbb0377aad6d4079f4e9c82b32e0a7a
font_02_sfnt_off000127cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127CD 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2