Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc5e02c90f2f3ba5…

MALICIOUS

PDF

80.6 KB Created: 2021-03-01 20:20:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 63f789bb8c0e10f6abbd51b6eb6b3f4e SHA-1: df1c1e6e7ebfe5f1f16b74fdbcf60e5ab7509d4f SHA-256: dc5e02c90f2f3ba5f6b94c46255ca7f8d8b7415f9b655469bff4cc022cdc7049
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://dugedepap.ru/aws?utm_term=war+of+the+worlds+1953+alien PDF link annotation
    • https://cdn.sqhk.co/wepunajexiju/Md2hbzv/las_vegas_packages_deals_all_inclusive.pdfIn PDF document text
    • http://vesebetaneju.iblogger.org/statistics_for_business_decision_making_and_analysis_3rd_edition_free.pdfIn PDF document text
    • http://stal-kemerovo.ru/real_chess_board_pricen873m.pdfIn PDF document text
    • http://nazorizuz.medianewsonline.com/nabegajararenarofomovi.pdfIn PDF document text
    • https://komuwewolidixat.weebly.com/uploads/1/3/4/8/134871085/0a417aa57be57.pdfIn PDF document text
    • https://kunobozawi.weebly.com/uploads/1/3/1/4/131453145/juzulagerowej_mipekemal_lupawu.pdfIn PDF document text
    • https://sakixuso.weebly.com/uploads/1/3/4/4/134488330/bawesusipapimuxapef.pdfIn PDF document text
    • http://tonorubur.22web.org/play_store_jio_phone_game.pdfIn PDF document text
    • https://kuvugelovusilu.weebly.com/uploads/1/3/4/4/134437140/povazavonidem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://dalitixusukewo.epizy.com/logitech_surround_sound_speakers_z506_no_power.pdfIn PDF document text
    • http://fobixejavol.rf.gd/how_did_world_war_1_affect_indian_nationalism.pdfIn PDF document text
    • http://tifilumiteva.epizy.com/53905784837.pdfIn PDF document text
    • http://girupesoja.rf.gd/lorexaraninevuzatusa.pdfIn PDF document text
    • http://jopivot.rf.gd/25951679463.pdfIn PDF document text
    • http://xugekevilop.rf.gd/puducherry_tourism_information_centre_white_town_puducherry.pdfIn PDF document text
    • http://zupitatip.atwebpages.com/tegidarixejaj.pdfIn PDF document text
    • http://zopujozeze.rf.gd/73935450536.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF151 5384 bytes
SHA-256: 49574aa0fe6ae6f8e5921271cec333c747206c1f95b370b65a072ae87fdf5bf2
font_01_sfnt_off000103b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B0 10752 bytes
SHA-256: eeb575a0477dec33116809dab14670730955060c240835384997c7d61e2b4a20
font_02_sfnt_off0001273d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1273D 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3