Malicious PDF — malware analysis report

Static analysis result for SHA-256 63e74cbdc6b618a9…

MALICIOUS

PDF

74.1 KB Created: 2021-03-05 07:39:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: ad22c71b18b7ad12eb1546078e6a7ec4 SHA-1: 8bbc62c45d4598374afa3190a7e86c210d63f415 SHA-256: 63e74cbdc6b618a99fa4d9909b4e60d91418bffb1000dd44724760b4245c89f2
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The embedded content, though heavily obfuscated, appears to be a lure related to computer hardware components, likely intended to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://fokemale.ru/wb?keyword=describe%20computer%20hardware%20components%20and%20their%20function PDF link annotation
    • http://itmax.info/70353839520qf66f.pdfIn PDF document text
    • https://xolesozetenosox.weebly.com/uploads/1/3/1/0/131070434/5386633.pdfIn PDF document text
    • http://resimpub.com/tafujuvawuzodujudinulezav5q51.pdfIn PDF document text
    • https://fofifiso.weebly.com/uploads/1/3/4/6/134613093/bibozuzovaj.pdfIn PDF document text
    • http://excschool.ru/alter_ego_names_examplesz0f80.pdfIn PDF document text
    • https://mopotiwifatuge.weebly.com/uploads/1/3/0/8/130813373/4192284.pdfIn PDF document text
    • http://buytoday.cc/why_is_piriformis_syndrome_so_painfulbrens.pdfIn PDF document text
    • https://nunamifeko.weebly.com/uploads/1/3/2/7/132740424/jefabom.pdfIn PDF document text
    • http://in-arenas.com/xufugufosxv.pdfIn PDF document text
    • http://amaryllis.space/xumuwomunujereljo61d.pdfIn PDF document text
    • https://jikujumek.weebly.com/uploads/1/3/5/3/135318263/7240267.pdfIn PDF document text
    • http://doorstepcomputers.com/jutas_complete_textbook_of_medical_surgical_nursing_free_download51xvb.pdfIn PDF document text
    • https://narosixepitifon.weebly.com/uploads/1/3/5/9/135960882/5761183.pdfIn PDF document text
    • https://gakewejodum.weebly.com/uploads/1/3/4/9/134902465/ef4bf60c8.pdfIn PDF document text
    • https://wexabegolorumad.weebly.com/uploads/1/3/4/3/134351445/a91aebe585.pdfIn PDF document text
    • https://rajuvafawomok.weebly.com/uploads/1/3/4/4/134455823/tedozepeforukov_ritis_kewarowekadu_botul.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/254f0089-a3ee-4ebf-8ffc-a09ccced7c31/17610269043.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad1978fe-2e0a-4d28-a1ac-b25f0ea91ab5/free_dressmaker_2402_sewing_machine_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/315dec7d-034e-47f3-a0cb-71dbe61d245a/is_probability_theory_hard.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9522ad3-9837-41a8-a417-29338764ab69/88520061366.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b7aed46-96df-4f04-b1b8-44db78bb4df0/simetomenafaxajumenaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd6f19c3-2ad8-4312-a1b6-cc68b6f92537/diono_radian_3rxt_convertible_car_seat_canada.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_off0000e3c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C4 5592 bytes
SHA-256: 7eca4d35221583f572a60a96c5029939694d529c4fd38d7ebf873a5200d80bc0
font_01_sfnt_off0000f6ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AB 10540 bytes
SHA-256: f269dfe47c3d39c81f5d737fc61804ad21d75485a8b90da4a8b036fa3b643f63