Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dbed7c954308857…

MALICIOUS

PDF

80.6 KB Created: 2021-03-06 08:43:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 8e9a4032e36e85394c75047298f11414 SHA-1: 1e80d79f8ca06ffeef750d1f80eb103fc90a4c95 SHA-256: 8dbed7c9543088574e871d89dabc474f5fca10cc7c2e9a824f783082d1744536
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, many pointing to disposable hosting, suggesting a link farm or SEO spam tactic. The embedded URLs like 'https://jacksth.ru/wix?keyword=dyson+v7+instruction+manual' are likely part of a scheme to redirect users to malicious sites. No scripts were extracted, but the PDF structure and link farm heuristics strongly suggest an attempt to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jacksth.ru/wix?keyword=dyson+v7+instruction+manual PDF link annotation
    • https://cdn.sqhk.co/sanojuxako/iiciaTp/45213775744.pdfIn PDF document text
    • https://cdn.sqhk.co/ridasozewe/Glhhjcz/sukuzigapojipodeso.pdfIn PDF document text
    • https://jarosebat.weebly.com/uploads/1/3/4/6/134695718/temovufemolulejowi.pdfIn PDF document text
    • https://cdn.sqhk.co/rakujolo/jjV6jhN/xoxesubov.pdfIn PDF document text
    • https://cdn.sqhk.co/masamiwe/S5ZheSa/angry_birds_2_soundtrack_list.pdfIn PDF document text
    • http://wapividazofar.scienceontheweb.net/bissell_proheat_12_amps_troubleshooting.pdfIn PDF document text
    • https://cdn.sqhk.co/xeveweno/gchiidX/7766444010.pdfIn PDF document text
    • https://subisadorug.weebly.com/uploads/1/3/1/6/131637552/tedasowu_numosi_lilibag.pdfIn PDF document text
    • https://cdn.sqhk.co/lebereme/iqjfij1/77138889720.pdfIn PDF document text
    • http://gipogup.sportsontheweb.net/zovugodaredudevekiti.pdfIn PDF document text
    • https://cdn.sqhk.co/nowovadizeb/jfO9bmT/guwubuvobeluridi.pdfIn PDF document text
    • https://cdn.sqhk.co/rizonozugaj/haIDMc0/14979777450.pdfIn PDF document text
    • http://kuboduzuke.mypressonline.com/nordic_male_names_for_dogs.pdfIn PDF document text
    • http://sipipewawezizuf.getenjoyment.net/75058633019.pdfIn PDF document text
    • https://cdn.sqhk.co/gabogivoxavi/4ibxGhi/a_tag_knight_mod_apk_android_1.pdfIn PDF document text
    • https://duvefotod.weebly.com/uploads/1/3/1/3/131380754/lujatigibagom.pdfIn PDF document text
    • https://tedalemom.weebly.com/uploads/1/3/5/3/135398197/163f7979f3eff.pdfIn PDF document text
    • https://vefamomapebimid.weebly.com/uploads/1/3/1/4/131406391/7577136.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1060033-e91f-431f-b12e-b7833bf700c8/9417919337.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04eebf95-a47b-4a28-9ed5-6e2dd63dc844/mr_heater_big_maxx_50000_btu_manual.pdfIn PDF document text
    • https://8d6920c1-aef5-45ed-b1a0-e693d63948fb.filesusr.com/ugd/0a593f_f77873720b9d461c9dadaa4e26b0ec5c.pdf?index=trueIn PDF document text
    • http://zowofiz.myartsonline.com/16733604846.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57a2fde5-090b-4c3e-9641-eba5269f8cc2/sony_nex-fs700r_specs.pdfIn PDF document text
    • https://f6ce3cfb-f922-470c-9e0e-eaf724001b0e.filesusr.com/ugd/defcb2_99405aa6c711497e9f8668a1925d8422.pdf?index=trueIn PDF document text
    • https://2d130471-2a64-48ba-87cf-8f1e86c6acad.filesusr.com/ugd/9c43ec_08a1e3778c994a778550312f91a9b312.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5e432af-6a27-4134-9697-3b5725670f50/netigimebonukonivaru.pdfIn PDF document text
    • https://29ce6865-365c-47c4-9f0a-635d6f965865.filesusr.com/ugd/0d6b77_253687b1747244c4b9b6f8fb6742ce37.pdf?index=trueIn 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_off0000f133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF133 5184 bytes
SHA-256: 017423f612a7f2fa38d9bbe0298b7f55a1acb3b54db6709b5a213257bb27762a
font_01_sfnt_off000102d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D5 2168 bytes
SHA-256: 224dfc1c4c166ba1dd370a93ff9e22fd9f28ee6fbbe7e759ed3b181a6ed8618c
font_02_sfnt_off00010c34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C34 12216 bytes
SHA-256: 5e546570aa47d1204abe71d0b80cb2c701ec3e11f0f6a12e2600bd873ca7ba46

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