Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6d934046f56168c…

MALICIOUS

PDF

79.8 KB Created: 2021-04-11 01:39:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 021e9983d4141eed3a51e6c254e8fd9a SHA-1: 2cc82568e4f0267f4c9d74349dc8e85ee8f0e093 SHA-256: a6d934046f56168ce63c01a3ddb35cb2348ec94c0369b1216fb1121b2952a879
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains a large number of external links, with the primary observed URL being https://maypoin.ru/strik. This pattern is often used to distribute malware or conduct phishing campaigns, and the presence of embedded links points towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/strik?utm_term=how+to+use+noco+genius+boost+pro+gb150
    • https://musigimipipo.weebly.com/uploads/1/3/4/4/134470090/bamemedaro_tageligugilasas.pdf
    • https://bugotenopiziwa.weebly.com/uploads/1/3/0/9/130969298/9823660.pdf
    • https://cdn-cms.f-static.net/uploads/4457302/normal_6056d601e30bf.pdf
    • http://loberas.22web.org/kannada_a_video_song.pdf
    • https://cdn-cms.f-static.net/uploads/4418365/normal_604055b543b11.pdf
    • https://sugopubix.weebly.com/uploads/1/3/1/6/131637077/42c2316eb07.pdf
    • https://cdn-cms.f-static.net/uploads/4366344/normal_5fe76de78cf5d.pdf
    • https://xifalazixaxidig.weebly.com/uploads/1/3/0/8/130874217/funemo.pdf
    • https://jugotazotezolut.weebly.com/uploads/1/3/5/9/135973864/fixevida-lejasere-degutetatejazoj-jazoxedirez.pdf
    • https://cdn-cms.f-static.net/uploads/4404953/normal_6013a2f7b92f6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/860c4fa5-93e5-4b1a-badc-d00295132eef/sims_3_pets_ps3_cheats_money.pdf
    • https://e0d0d77b-4c00-4265-bc22-f0cc5cf11ada.filesusr.com/ugd/957eb4_83906e4ace1a43e59cbbc37f21c88ec5.pdf?index=true
    • https://uploads.strikinglycdn.com/files/66c23089-9e3b-46db-b696-493be1b1c58b/how_to_remove_dark_spots_caused_by_pimples_home_remedies.pdf
    • https://b23183eb-b2e5-455e-bc25-91fac1efd10f.filesusr.com/ugd/cc14e4_a0e4f97c4bd44f29b8a6b1df6178b0da.pdf?index=true
    • http://velozuko.rf.gd/gabugosafaxiwegosigaxinak.pdf
    • https://uploads.strikinglycdn.com/files/27984232-269c-4dc8-a643-5b8cf7cf3b29/34782709008.pdf
    • https://aee666f7-65d2-4416-8089-42e5bd85255d.filesusr.com/ugd/c4036c_8473e52030734ae091eb4ff2220ff59d.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed26.bin
7779134ea9bdb89d55f9807486ab323607c33dcb898d28ec58c2f80d7ec709bf
pdf-font-stream PDF embedded font (sfnt) at offset 0xED26 5252 bytes
font_01_sfnt_off0000ff2d.bin
97fb086312daf6dc584317ef9a5ef8e7f19d48adb2c5fa3970cbe87af71507db
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2D 10732 bytes
font_02_sfnt_off000123e7.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0x123E7 4324 bytes