Malicious PDF — malware analysis report

Static analysis result for SHA-256 bda06da8745502c5…

MALICIOUS

PDF

80.5 KB Created: 2021-03-29 01:19:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 8fa4de9d887d5aed4ec56c81f49025fa SHA-1: 3f0e5bad9f5153666bedcc39d74c57e43e5d37fc SHA-256: bda06da8745502c5358fcbe214087d07f535cffee96785e16b0cecbb0e5dbf82
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or malware distribution. Heuristics indicate it's a link farm on disposable hosting, and ClamAV detected it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious content, likely initiated by embedded JavaScript.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://lozipotod.ru/123?utm_term=aeropress+manual+grinder PDF link annotation
    • https://gareketekefebon.weebly.com/uploads/1/3/4/6/134695024/1d125676cf890.pdfIn PDF document text
    • https://wisukasef.weebly.com/uploads/1/3/1/4/131453855/kugin.pdfIn PDF document text
    • http://com-connexion.xyz/57769931059gh06k.pdfIn PDF document text
    • https://bapumora.weebly.com/uploads/1/3/2/7/132740837/zejisadutuzowan-vikebilajon-jotaruw-wugubewij.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475859/normal_5fcc6d31e54c7.pdfIn PDF document text
    • http://sdek-24.cc/nabonamilldiyl.pdfIn PDF document text
    • http://lnstagram-help-businesss.com/swift_vdi_imagesqwjkq.pdfIn PDF document text
    • http://confirmyourverifiedbadge.com/bixuwetexagiratupofisucwcxx.pdfIn PDF document text
    • http://sale50.pro/43736045413lasqa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376857/normal_605fb58a7b8b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422377/normal_5fea13e5cc684.pdfIn PDF document text
    • http://healthytrands.com/81885778877pytqi.pdfIn PDF document text
    • https://buvokatawun.weebly.com/uploads/1/3/1/3/131378806/8bb8363d7.pdfIn PDF document text
    • http://espaceabone.com/what_does_it_mean_to_be_gnostic3me5t.pdfIn PDF document text
    • https://duwaxitim.weebly.com/uploads/1/3/4/3/134312722/tifom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425728/normal_601dbe2b12e0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411944/normal_604500346fd39.pdfIn PDF document text
    • http://disconto50.pro/boworuforisekitezig0lo8y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454546/normal_60467fba77b29.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sadorebudinazu.epizy.com/vujunulelo.pdfIn PDF document text
    • http://lebemowabekoko.rf.gd/el_cambio_climatico_en_colombia.pdfIn PDF document text
    • http://dufemeg.epizy.com/the_white_mans_bible_for_sale.pdfIn PDF document text
    • http://bavalibonoz.rf.gd/viper_model_3105v_manual.pdfIn PDF document text
    • http://bitiwumit.rf.gd/adobe_flash_player_debugger_chrome.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_off0000fb86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB86 5268 bytes
SHA-256: bfad5344d0f4eddd5c12bd1121ed6853a0b501b494cbc6f14ed2f21656e4406e
font_01_sfnt_off00010d58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D58 11292 bytes
SHA-256: 00d711517dee07a3be366a19656978c1d9073f502cfbdc4602554787d7122a2b

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