Malicious PDF — malware analysis report

Static analysis result for SHA-256 cacc31b67b83e05d…

MALICIOUS

PDF

95.3 KB Created: 2021-05-17 06:18:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 5a80ab485ec29d5b2d1286350e6ac8fb SHA-1: 2200df6c7405ccb74d251de1a488df0e2f3d26f9 SHA-256: cacc31b67b83e05d8d8bec820ca7b9c13a01f40c7d65d76389934efd5ab4a98d
206 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, indicative of a link farm or SEO manipulation tactic. The presence of a callback lure heuristic suggests a potential phishing or scam attempt. While no scripts were directly extracted, the PDF structure and link farm activity strongly suggest malicious intent, possibly to redirect users to malicious or phishing content.

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://jottigo.ru/strik?utm_term=how+to+cancel+rosetta+stone+on+iphone PDF link annotation
    • http://sowoxapexemex.sportsontheweb.net/html_color_codes_and_names.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368266/normal_6033fb627b8e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465539/normal_60484b839efdc.pdfIn PDF document text
    • https://wemizufatevovig.weebly.com/uploads/1/3/4/8/134896488/fedojo_ginesafopar_pegalaxone.pdfIn PDF document text
    • https://jofomozali.weebly.com/uploads/1/3/5/3/135387403/6332466.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413008/normal_5fd308b7c2fb3.pdfIn PDF document text
    • http://melidagerukebel.sportsontheweb.net/arabesque_claudia_roden.pdfIn PDF document text
    • https://fitovixuzo.weebly.com/uploads/1/3/1/3/131380078/navimibipuzefolake.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://womawujun.atwebpages.com/basel_iii_download.pdfIn PDF document text
    • https://dab7fb03-f2af-4a8e-9cb9-31de623bedb3.filesusr.com/ugd/58b596_7a3c54a822134893979ceb08a33a78c6.pdf?index=trueIn PDF document text
    • http://dusameferadulo.onlinewebshop.net/email_marketing_download.pdfIn PDF document text
    • https://37e79482-e567-4eff-b449-6ea9b90d4679.filesusr.com/ugd/cff0cd_782942ecdc2e4c0a93ae5d3263cb7e82.pdf?index=trueIn PDF document text
    • https://7737876a-f762-42ef-af6f-18b78abacabf.filesusr.com/ugd/9066bd_212d9c4b0ad345b1ba380c7774e4b9b2.pdf?index=trueIn PDF document text
    • https://ddd59a73-be73-4575-bd7b-2e5900175f8b.filesusr.com/ugd/5dc0ef_07c20590fb6041ecb8568a61dafac337.pdf?index=trueIn PDF document text
    • https://ac911ccd-a574-46a9-bbb3-57bb927ff796.filesusr.com/ugd/2735c9_4472053231ab426da98121152f0b9bec.pdf?index=trueIn PDF document text
    • https://fb79ad55-22b5-4823-9538-35c71bbbd514.filesusr.com/ugd/ea423f_15ffe53bcfe944d188abc07bf7a25020.pdf?index=trueIn PDF document text
    • https://471876dd-1950-42f1-a4b7-18bccbaeda70.filesusr.com/ugd/5d8976_a08d69cdb4b24f1d8b64912347006f37.pdf?index=trueIn PDF document text
    • https://3778afa4-e5d9-4bb6-be54-d343c89b577b.filesusr.com/ugd/11c894_d8f5b708e24a4e43bf0b04d3d205ba67.pdf?index=trueIn PDF document text
    • https://ef2e072a-e8a2-4438-804d-cc750be2e2f6.filesusr.com/ugd/6a22cb_5d4e659557b8486f93624de5deaf11a0.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_off00012957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12957 4864 bytes
SHA-256: ec2405ab8e79632de5d0d3b5774977a7fa5380161aca1b50bcf9725d98cf3bb8
font_01_sfnt_off000139d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139D7 11992 bytes
SHA-256: 23bf1e26d2d469a2409bd0ee9a760922ca3cb3b03f344b7acb0b9612fa0424d3
font_02_sfnt_off000161d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161D0 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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