Malicious PDF — malware analysis report

Static analysis result for SHA-256 800a2afe5248aa19…

MALICIOUS

PDF

82.6 KB Created: 2021-03-06 14:40:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b669884b6f5827c338b8943463f0cfa0 SHA-1: be77efb74a568a31301a29acaf894f9d397d6a90 SHA-256: 800a2afe5248aa19b4cb71aa7e309ed02955f77ed286f7d234f5d81f6d5d2f31
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, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/strik?utm_term=how+much+does+a+makeup+kit+cost+in+usa PDF link annotation
    • http://ferejupaxebul.iblogger.org/22698532354.pdfIn PDF document text
    • https://cdn.sqhk.co/wovenebi/UiaFTmi/zapuxumeruwidijakuzanipij.pdfIn PDF document text
    • https://cdn.sqhk.co/merojuniv/6dhid61/95806315035.pdfIn PDF document text
    • https://cdn.sqhk.co/tixukiko/eiigeyX/scummvm_android_download.pdfIn PDF document text
    • https://cdn.sqhk.co/romilononove/4YPgdMV/stiletto_nails_black_and_red.pdfIn PDF document text
    • https://digexuvin.weebly.com/uploads/1/3/2/8/132814990/3530233.pdfIn PDF document text
    • http://jirolor.iblogger.org/drum_metronome_app_android.pdfIn PDF document text
    • https://wavidamos.weebly.com/uploads/1/3/4/3/134316051/tofonalonamido.pdfIn PDF document text
    • https://noxerurivago.weebly.com/uploads/1/3/4/7/134767941/niwivumidikenit-bifupejulamaja-nesomiz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bed1e925-73f7-457c-87ff-53f226988024.filesusr.com/ugd/d4a8ce_a56ad042e1074d98924657ad1b5daab2.pdf?index=trueIn PDF document text
    • https://ac263381-fdad-4fda-ae78-6df6d71032d6.filesusr.com/ugd/25c42e_cc2cd25e0c4144f68c04e4fd83575986.pdf?index=trueIn PDF document text
    • https://77047a80-9f17-4504-a563-a097c25ca12e.filesusr.com/ugd/5c8b2f_64a0569587224148b26b48da183a32e4.pdf?index=trueIn PDF document text
    • https://6afed14e-2b01-442b-8c2e-11a8a6f39965.filesusr.com/ugd/46a5ae_42823824fdf44c779d9fa882a33fb788.pdf?index=trueIn PDF document text
    • https://71e5fc8e-cc9a-4633-96c3-2c70acd464d0.filesusr.com/ugd/f08e01_e6b6ef4a21664c69b589f9a8886e1862.pdf?index=trueIn PDF document text
    • https://d09251a9-b09e-4077-8ccb-24037f005f7b.filesusr.com/ugd/a6ce17_a394cd15bcb24d3c8b80c808df3ab127.pdf?index=trueIn PDF document text
    • https://661c91a2-68a2-4ae3-aaac-ef96b6cc7894.filesusr.com/ugd/b926a8_9bbb65f27bb745bdb22532f7da21bc00.pdf?index=trueIn PDF document text
    • https://6200e599-3f2f-4e3e-ab45-e6977ed7e777.filesusr.com/ugd/f8de3e_888569b180c94624a121d017f387cfbb.pdf?index=trueIn PDF document text
    • https://627f215e-41ba-4aa4-9906-5f9f9d117739.filesusr.com/ugd/8ab72e_841adc6f94774f7bb9760c492ff0e4d3.pdf?index=trueIn PDF document text
    • https://883cd1dc-02d0-4059-8fa2-99201f92b631.filesusr.com/ugd/6166c9_a5f42a87e6594d349bd003810ed6c10a.pdf?index=trueIn PDF document text
    • https://49432a94-54bc-4d13-9d12-ea41d731e1b8.filesusr.com/ugd/a7c689_6c0d1fb1728844d7aa36d108c0b19083.pdf?index=trueIn PDF document text
    • https://da9d63b4-fbfd-4f6f-88e7-06ac0d76355b.filesusr.com/ugd/ca300b_ae389b15a2344bf3b642c3eacfba312c.pdf?index=trueIn 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_off000103bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103BF 5300 bytes
SHA-256: 14bd0bc3a9e42bd0bd2dbe379f1b319b23ae06069f55331a9a6ea3eed898f86b
font_01_sfnt_off000115b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115B6 11616 bytes
SHA-256: 17f548dcc3e0b2026e13c184d1d9f2bc4dfbe0b8bed0cdc5fdd4febff56ecd45