Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d012b7540b2f2e3…

MALICIOUS

PDF

73.5 KB Created: 2021-06-02 19:05:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 8f2dff1ef6f99200325c6b585f31d7bd SHA-1: f4753fb8c2d8ad2172eb378e3ca1fa482a71594c SHA-256: 5d012b7540b2f2e3001aab0d0c2220ec782a8f55d5d3bd7f86c4636c4713cb7c
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, indicating it is part of a link farm designed to drive traffic to potentially malicious or phishing websites. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of numerous external URLs and the heuristic findings point towards a phishing or content-distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://pixomot.ru/pbw?utm_term=whirlpool+refrigerator+repair+manuals PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4451561/normal_5ffd578f5d12a.pdfIn PDF document text
    • https://kixujededewi.weebly.com/uploads/1/3/0/8/130814479/6085b5.pdfIn PDF document text
    • https://nedovewa.weebly.com/uploads/1/3/5/3/135316636/6c969240f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453906/normal_6017285e27b0f.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4454277/normal_60b306fd3609b.pdfIn PDF document text
    • https://tadesurirow.weebly.com/uploads/1/3/2/7/132711952/soleloxa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388050/normal_6005287655034.pdfIn PDF document text
    • https://vizizudo.weebly.com/uploads/1/3/1/8/131856469/wipiraxejaf_feben_vazuwewewas_dexefanulodep.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/178bcc6e-0419-4062-982c-7d3328d52bbc/zigakiliwekurarudezuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23f8381b-600b-436d-8c4c-f0b6f327c8e5/beat_saber_expert_plus_faster_song.pdfIn PDF document text
    • http://xojifot.pbworks.com/f/gisokawigoneritexulula.pdfIn PDF document text
    • http://pilujibos.pbworks.com/w/file/fetch/144486792/mimuvuvokufim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2baacb12-6658-4527-ad60-13f6e86e4afe/76226286129.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7daf2d0d-d062-4ac2-810d-60b933e984bd/zixiduzateba.pdfIn PDF document text
    • http://tusawijer.pbworks.com/f/how_to_free_rp_in_lol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fb75cc7-424b-46ef-803f-06eaf8a36264/xekezekupuxusataroloba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9e47d20-16c9-472c-b248-2b64b5621663/california_association_of_realtors_lease_agreement_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9778a4c-6e9a-4474-aee4-8e3135cb5eec/what_are_the_signal_words_of_classification.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af9f42dd-d810-41a6-9266-277f90209478/matlab_plot_legend_in_loop.pdfIn PDF document text
    • http://zegugas.pbworks.com/w/file/fetch/144427839/how_to_prepare_for_interview_job.pdfIn PDF document text
    • http://jajisaparev.pbworks.com/w/file/fetch/144420303/hijyen_eitimi_sorular_2019.pdfIn PDF document text
    • http://naxoxututal.pbworks.com/f/moginudamilumopatixawuzi.pdfIn PDF document text
    • http://nilanom.pbworks.com/w/file/fetch/144415170/how_to_install_prodigy_p2_brake_controller.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_off0000e12f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12F 5328 bytes
SHA-256: 9daf84baf69d8ce913acc9975a8e1e8b1f2d831ed0ee142d2bdfaba1b6109eda
font_01_sfnt_off0000f334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF334 11040 bytes
SHA-256: c85f0aac28af021e4a2bc7523c57f8b7f01613a842dd19b4afe58ae200c1f42a