Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d55e8b1f9f2e68c…

MALICIOUS

PDF

71.9 KB Created: 2021-03-07 06:51:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 8c234a606b131b2127cdb1f33433d51f SHA-1: f761ddda2bbc81a2fdd35f5f7039c940173eed03 SHA-256: 3d55e8b1f9f2e68c3b5832e4a11918b1bc0ad049fae1e4d69f1fabf4ec0d6a56
184 Risk Score

Malware Insights

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

This PDF document contains numerous embedded URLs, with a primary link pointing to a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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/wix?keyword=skyrim+mod+dual+sheath+redux+skyproc+patcher In PDF document text
    • http://xorimomupajo.scienceontheweb.net/whats_the_best_workouts_to_lose_weight.pdfIn PDF document text
    • https://lezafopiga.weebly.com/uploads/1/3/4/6/134628758/6176311.pdfIn PDF document text
    • https://pilogowizimofog.weebly.com/uploads/1/3/4/6/134604263/7500008.pdfIn PDF document text
    • http://rarebuzoxexovom.22web.org/unwind_series_book_4.pdfIn PDF document text
    • http://nosilekexiwot.mywebcommunity.org/what_is_norse_mythology_based_on.pdfIn PDF document text
    • https://kowijifeno.weebly.com/uploads/1/3/5/3/135390944/b69fc88d931b.pdfIn PDF document text
    • https://tererenigi.weebly.com/uploads/1/3/1/4/131405956/fesawe_rilefilila_tikagiraxu_nafokiwek.pdfIn PDF document text
    • http://rijewomel.scienceontheweb.net/87468586806.pdfIn PDF document text
    • http://guzexesuge.mypressonline.com/mensa_practice_test_results.pdfIn PDF document text
    • https://nasaperexi.weebly.com/uploads/1/3/5/3/135351481/6753a06ad.pdfIn PDF document text
    • https://sitegevom.weebly.com/uploads/1/3/4/6/134664280/9982553.pdfIn PDF document text
    • https://pasorizafam.weebly.com/uploads/1/3/4/0/134096756/4450446.pdfIn PDF document text
    • http://xigegojaliku.iblogger.org/21013324712.pdfIn PDF document text
    • http://venolilixe.mygamesonline.org/53332106149.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zurovajij/yokatta_dx-_8_bundy_clock_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/dream_league_soccer_classic_hack_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/miller_trailblazer_302_air_pak_parts_manual.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2F 5652 bytes
SHA-256: 613f51a831acae287b7ee24275d469ac4297422c1e975ed22c8d469fff236607
font_01_sfnt_off0000ef45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF45 10240 bytes
SHA-256: c65c281a9955bdb0d6382186fac7779c2ee76bc08cb57c4c99983de7525d35c0

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