Malicious PDF — malware analysis report

Static analysis result for SHA-256 04b855d0d7620299…

MALICIOUS

PDF

125.6 KB Created: 2021-04-24 22:48:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a497bb3ff4f1e160deef401b59308b3 SHA-1: 9e03331dab4840ca6168904bd7b918446306539e SHA-256: 04b855d0d762029908fcffe8b41b842661ebfa93d07cd2acfcdfc1d1594dcd09
174 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of an advance-fee scam, presenting a lure for a free dictionary download while containing numerous links to disposable hosting domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://vilenefex.ru/strik?utm_term=quranic+arabic+dictionary+free+download
    • http://energytik.net/chromosome_theory_of_inheritanceupsys.pdf
    • http://fbdirect.site/presentation_online_templatesjmogu.pdf
    • http://natiral.space/44695673897bqpyi.pdf
    • https://cdn.sqhk.co/woravejafeto/a8ggggv/nakiwubopowefetexu.pdf
    • http://helpforteam.com/47478516639t8lrt.pdf
    • http://fazejajogavu.medianewsonline.com/advocare_24_day_challenge_grocery_list.pdf
    • http://vosajizegek.mypressonline.com/67438820654.pdf
    • https://cdn.sqhk.co/lasesekov/AvichdG/27190070588.pdf
    • http://jobauthor.online/6043368549em8kq.pdf
    • https://cdn.sqhk.co/romemanir/VvZieic/zikakumonimejisovema.pdf
    • http://yogistika.space/20806021068gz9x2.pdf
    • http://smeh-mif.space/47836409429s7e37.pdf
    • http://vidclips.design/what_are_three_strategies_for_conflict_resolutionv4j31.pdf
    • https://cdn.sqhk.co/walamalesumi/U1V5giJ/classic_words_solo_for_windows.pdf
    • http://masalev.ru/frigidaire_50_pint_dehumidifier_with_pump_manualtd9yx.pdf
    • http://tezoxefakalexo.sportsontheweb.net/pathophysiology_notes.pdf
    • http://nesobaka9.xyz/zuzujadag5lf8i.pdf
    • https://cdn.sqhk.co/losomilodip/hbjjib9/bulleit_bourbon_rye_total_wine.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/551c564d-112b-42ea-a2e0-cc528acde641/black_box_thinking_meaning.pdf
    • https://4b523d79-2bc6-404f-8e52-0acae4d2cb03.filesusr.com/ugd/fe1b41_99591f3473914ec6b56d0a0fb58bc988.pdf?index=true
    • https://uploads.strikinglycdn.com/files/52bd9f26-2aba-49ce-9897-354f27ee80d5/greek_mythology_demeter_and_persephone.pdf
    • https://uploads.strikinglycdn.com/files/de3305d8-43e9-47d4-9286-61e00905faf8/tabla_pulgadas_a_mm_tuberia.pdf
    • https://493f174a-a540-412c-bacb-e5b7b26cbfcf.filesusr.com/ugd/95bb70_ac2e06639131490c8abaa4df40ae46e2.pdf?index=true
    • https://uploads.strikinglycdn.com/files/31c1d960-399e-49eb-820a-213ecdda147d/msi_760gm-p23_fx_windows_10.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001b288.bin
6249a3fb717e37f93277b3c807917bf8685e138723640e3f5730e01673061d10		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1B288 30448 bytes
font_00_sfnt_off00017338.bin
745686840ceec69e867f01784a9ac60789115d3de87dfc718d51edd9494e1861		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17338 5232 bytes
font_01_sfnt_off0001852a.bin
8a17d4774d47db6d98720675f250f5740dccf7df1033a27d9b306e7707b3ed00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1852A 14204 bytes

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