Malicious PDF — malware analysis report

Static analysis result for SHA-256 a97a4cfb2f849886…

MALICIOUS

PDF

80.7 KB Created: 2021-03-19 14:47:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bbef5bd0057ca14b1c4e3fb2177238e1 SHA-1: b36f6cf2891cb600ca9cf96923cbc34325e6ff75 SHA-256: a97a4cfb2f849886439e898e66c58863d48ec01677560c13722b658413efa2c9
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common technique for SEO spam and phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. The primary URL, 'https://dafemum.ru/strik?utm_term=casio+baby+g+shock+watch+manual', suggests a lure to a malicious site, likely to deliver a second-stage payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dafemum.ru/strik?utm_term=casio+baby+g+shock+watch+manual
    • https://cdn.sqhk.co/vujaderaz/tjf4hdP/62736439631.pdf
    • https://cdn.sqhk.co/kigimole/hi7xmEu/english_to_marathi_offline_dictionary_download_for_android.pdf
    • https://bunekapizo.weebly.com/uploads/1/3/0/9/130969144/1428306.pdf
    • http://tavafotuzefox.sportsontheweb.net/xpert_bcr_abl_ultra.pdf
    • https://cdn.sqhk.co/xumesapaxoku/hijhaRm/black_friday_deals_best_buy_laptops.pdf
    • http://forisawidokomor.sportsontheweb.net/college_panda_sat_math_free.pdf
    • https://gamekesilib.weebly.com/uploads/1/3/4/8/134892139/gorenegu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sepovutapakogaf/charmglow_grill_parts_near_me.pdf
    • https://s3.amazonaws.com/kisimujuk/warobapeselamumumetibotu.pdf
    • https://f579be4a-c2ec-451d-94ee-532237c06880.filesusr.com/ugd/9f6a24_f0c70e78941544769ac721fd57511c1c.pdf?index=true
    • https://f8b57e9d-e272-4783-b6f5-6420e6b93425.filesusr.com/ugd/886b73_c99230b25d224792961ed2ddf6f2e5f8.pdf?index=true
    • https://3dbd840c-7861-42b4-b064-af52d1d2f4eb.filesusr.com/ugd/86319b_7b267291f97947e68e220c0f542b040a.pdf?index=true
    • https://s3.amazonaws.com/zufaxepixiguxax/3_column_chart_word_template.pdf
    • https://44f68060-d5e3-4d58-b4e7-e3760392f352.filesusr.com/ugd/49488e_bb4f7b796cd148a88840107da29a35fb.pdf?index=true
    • https://0e8f88b9-656e-4b05-9cd8-8bd477f85547.filesusr.com/ugd/95b9ea_4ebe15b46419442eae363736922060c2.pdf?index=true
    • https://s3.amazonaws.com/gekixadonuru/jurassic_world_evolution_isla_muerta_guide.pdf
    • https://357b8bef-7330-4cfe-b31d-389db25c4d5a.filesusr.com/ugd/4c76bf_dd6427de16984d1db838bc1b92bd9607.pdf?index=true
    • https://d89d6b52-6e76-4e18-bccb-bd7428cfddad.filesusr.com/ugd/02beb7_3e42e943affe4347b97d86e14fadc36c.pdf?index=true
    • https://02e0da19-eac5-4521-950b-4e410541bf1c.filesusr.com/ugd/516249_93e33f1164bd452783cb7fb59833f566.pdf?index=true
    • https://s3.amazonaws.com/bupaxomu/commutative_property_worksheet_common_core.pdf
    • https://7162f0c1-3bb2-4775-9ad2-1e34613fb889.filesusr.com/ugd/595093_494abc3f9f034bb9b41e26221d80d47e.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc95.bin
5e7aa189a6bfe956afb3fb048d0f364412a78cefe5d7e990e02700fce0273402		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC95 5420 bytes
font_01_sfnt_off00010ef7.bin
f905f379dbd5e2a371f0c2ff426c53e9c1134e8073857a1b0370f224eeb9e09a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF7 10784 bytes

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