Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b7bfe25e10139d6…

MALICIOUS

PDF

140.0 KB Created: 2021-06-19 14:17:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 2e6c3ec472e0a82177a3539268ef936c SHA-1: 7b60120895d39c016051bd432dd2903064f8c7bc SHA-256: 0b7bfe25e10139d67657bdb871ce0a755c02221184f5d0f1d394f9edd3c26308
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The heuristic 'SE_PAYMENT_REDIRECT_LURE' further suggests the document's content is designed to trick users into believing there are new or changed payment instructions, a common tactic in business email compromise attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://queure.ru/uplcv?utm_term=how+to+get+free+robux+ios PDF link annotation
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa7867f090---29487359828.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/16079ec54ac123---tesuvupowoxulimo.pdfIn PDF document text
    • http://kaowei.tw/image/files/20210529_083158.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/16070b6d50d8cd---62698920683.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/ivt6jt33h1f08pu0jcmn221hna/38073828636.pdfIn PDF document text
    • http://myucpb.net/userfiles/file/kebusoderak.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608bcac2abf1e---93926116065.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/778124118c28d2b331e930db63bbdb5c/33124585804.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607880ebcfc44---9880709150.pdfIn PDF document text
    • http://branpc.in/ckfinder/userfiles/files/925985405.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/f787d3d5bbb6427f8035ea3ff58a5143/lijotelesevubona.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/pefusavebunatazozozovona.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/95e20fbcde28c2efe10c958be0ecd86d/77651917650.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/maripenulawosuw.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc80a515c7---43696125713.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/b3a51e3b9b7b49f7315889c6a129741c/7260269590.pdfIn PDF document text
    • http://tlumacz-lipno.pl/pdrzewiecki/files/mewupixo.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://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_off0001dcbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DCBC 4728 bytes
SHA-256: 26160f194d52a31cc16c572dce5db39a0ae939b6da42b2100d727fc01e14a95e
font_01_sfnt_off0001ed0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ED0C 11608 bytes
SHA-256: 3d1751a575a8673ba73e3a607e36084985aa91af8a25f557bcca42d222eeaac5
font_02_sfnt_off00021473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21473 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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