Malicious PDF — malware analysis report

Static analysis result for SHA-256 b314e47dce720d3c…

MALICIOUS

PDF

79.8 KB Created: 2021-04-01 12:49:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 845436b09100ecfb04fa052a89a44f3e SHA-1: bac83e7fbf086910b5b5b0ea79cf664979480d68 SHA-256: b314e47dce720d3c423d582b7abacba93d1abf1194b7f7ce854cc6c7fb226110
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains multiple external links, with one prominent URL leading to a phishing domain. Heuristics indicate a link farm and a callback phishing lure, suggesting the document is designed to trick users into visiting malicious sites or engaging with fraudulent support. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://pelibifir.ru/strik?utm_term=how+to+activate+a+dish+wally+receiver
    • https://cdn-cms.f-static.net/uploads/4379374/normal_605d774e27103.pdf
    • https://nepibosumu.weebly.com/uploads/1/3/4/3/134363752/kovem-miribixav.pdf
    • http://particulier-societegenerale.xyz/how_to_assemble_a_wahl_clipperhjqi7.pdf
    • https://mewarikubunaku.weebly.com/uploads/1/3/1/6/131637951/ledutujewuzubut.pdf
    • https://dufavepuxafolim.weebly.com/uploads/1/3/4/2/134266173/zidorarazatud-dadumo-rakiso-ziguverema.pdf
    • http://raicen.com/321989661837r4ap.pdf
    • https://cdn-cms.f-static.net/uploads/4427514/normal_60327f55ac4d6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/posufij/excel_vba_sheet_name_contains_string.pdf
    • https://s3.amazonaws.com/werowibovezoje/biohazard_4_english_version_apk.pdf
    • https://s3.amazonaws.com/jefobexapulow/jewefuloropikufo.pdf
    • https://uploads.strikinglycdn.com/files/f435746b-641b-4e44-ab60-35ea05b23fb3/perumo.pdf
    • https://s3.amazonaws.com/tarajix/kixufidusebenajijazegul.pdf
    • https://uploads.strikinglycdn.com/files/58524f86-0f74-400b-9ef3-0abbafc2ef4d/howard_miller_mantel_clock_vintage.pdf
    • https://s3.amazonaws.com/sugosubexez/bachiko_nannali_kannada_song_free.pdf
    • https://uploads.strikinglycdn.com/files/0085de5a-4370-4f00-ac7f-82b9359397ec/muwemozowonudijodaxipur.pdf
    • https://uploads.strikinglycdn.com/files/7c62d651-47b2-4e7f-b2be-56e03080fa24/bifad.pdf
    • https://s3.amazonaws.com/loxopudizus/manual_book_chevrolet_aveo_2004.pdf
    • https://s3.amazonaws.com/vatosolikijike/how_many_trades_a_day_day_trader.pdf
    • https://s3.amazonaws.com/goviwigax/8142132717.pdf
    • 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_off0000ecbd.bin
1897c63e1cf8034711bf4afdd6ef56c86049de0d79029275eaf4e36e7036d515		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECBD 4924 bytes
font_01_sfnt_off0000fd9f.bin
99c2d1dae700dfc70a0e2068b23e711e993d429eec75f85b091c4025804e785e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9F 10700 bytes
font_02_sfnt_off0001224b.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1224B 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.