Malicious PDF — malware analysis report

Static analysis result for SHA-256 60b70ee31e7547a7…

MALICIOUS

PDF

72.1 KB Created: 2021-03-10 05:43:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 0e6a9ce523d0a0ca3e96cd9178e40e17 SHA-1: 6ea1455ab4b96cb4d2192cc7170f6f6b00101ad4 SHA-256: 60b70ee31e7547a7183863ef64aea19f61fce304f1ae4e526f9e8a681efa812d
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, indicating a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://bologen.ru/wix?keyword=algebra+nation+section+3+topic+8+answer+key PDF link annotation
    • https://bexokafosirur.weebly.com/uploads/1/3/2/6/132695536/de6a07895d51.pdfIn PDF document text
    • http://storeplus.pro/adobe_photoshop_free_for_windows_8._1b9oir.pdfIn PDF document text
    • http://expressday.online/is_ruger_sr9_a_good_gun0189e.pdfIn PDF document text
    • http://xepuxupipe.mywebcommunity.org/chhattisgarh_census_report_2020.pdfIn PDF document text
    • http://dominis.xyz/18300046944k6aam.pdfIn PDF document text
    • https://fatitabo.weebly.com/uploads/1/3/4/7/134757356/93d2580872.pdfIn PDF document text
    • http://pipvip.ru/kenmore_model_116_vacuum_disassembly61m9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487419/normal_6030d949a5d70.pdfIn PDF document text
    • https://mebuduwo.weebly.com/uploads/1/3/1/4/131453299/c5d103.pdfIn PDF document text
    • http://ital-girl.space/fm_approval_guide_20184h65d.pdfIn PDF document text
    • http://limezage.scienceontheweb.net/50961676596.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420752/normal_60094f5d20ddb.pdfIn PDF document text
    • https://zunejafeg.weebly.com/uploads/1/3/4/3/134382709/divuvuruj-zijadomi-pegutipowuma-visav.pdfIn PDF document text
    • https://kofitabalu.weebly.com/uploads/1/3/0/7/130775223/giduzur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454562/normal_5fe678b46fedd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b983c4bf-258f-4389-889c-ea506d773ee4/pefewawite.pdfIn PDF document text
    • http://zejibanunepi.myartsonline.com/bowflex_xtreme_assembly_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a91a1064-dc62-4a8f-bf52-d0b5f8031705/21472899040.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb20d2c3-8e99-4844-8c85-5cd87ee7c3f0/breville_smart_oven_pro_air_fryer_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ce528e4-4be7-4898-abb9-48a5f59b8b02/4836238699.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac215a04-32cf-4920-b65c-f0ae39025c74/bixumenorap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/095d6382-d642-428a-bc65-0cb18a0627d8/wofopajipujamomefajifozig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/012e7996-3e52-4621-9c1c-c1c553370491/fulagunenilikidana.pdfIn PDF document text
    • http://gakamaxoluzes.atwebpages.com/liftmaster_formula_1_wifi.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB30 5844 bytes
SHA-256: 928c205d3bb675468b1a05b7f1b0c9eb8e4a4872f909cd533079dbf4bb192a1a
font_01_sfnt_off0000ef3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3C 10300 bytes
SHA-256: 5a62e8da27cbc68dbfcdb96c89c466f2455653eaa394abf00ca22137a2b97fd0