Malicious PDF — malware analysis report

Static analysis result for SHA-256 879d05de805faecf…

MALICIOUS

PDF

87.0 KB Created: 2021-04-28 06:20:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 0340b11359f76136f205a398cdb2cabd SHA-1: 5a9cd7e25adf8c287dd755b93208fddb317ed0ec SHA-256: 879d05de805faecfdb679fc611156addedd401472a00b9f741f937546438fe6c
206 Risk Score

Malware Insights

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

This PDF document is classified as malicious and contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to be related to 'Ak drivers license lookup', a common lure for phishing or malware delivery. The presence of numerous external URIs and the ML classifier's high confidence score indicate a strong likelihood of malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/strik?utm_term=ak+drivers+license+lookup PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375698/normal_6040a20101e08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486748/normal_60552a403bca2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451945/normal_60359b10ee79e.pdfIn PDF document text
    • http://lefibipefazefep.mypressonline.com/90234773234.pdfIn PDF document text
    • https://debozapo.weebly.com/uploads/1/3/1/1/131164198/zutalikoro.pdfIn PDF document text
    • https://kovepezerolozu.weebly.com/uploads/1/3/1/4/131483153/xalesugigesunumuv.pdfIn PDF document text
    • https://jipunexekamu.weebly.com/uploads/1/3/4/5/134588935/bejiso.pdfIn PDF document text
    • https://tabajojimito.weebly.com/uploads/1/3/4/3/134317549/2589006.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415745/normal_6066ad0e8c88e.pdfIn PDF document text
    • http://dezimazokuxulil.mygamesonline.org/44388262787.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://resilasijajatil.myartsonline.com/ferevafugavixekej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8b532d8-d210-4b0a-b2b6-af5b6d38dfba/48293494237.pdfIn PDF document text
    • https://c948e902-2437-43f3-9f1e-7aaad30688a7.filesusr.com/ugd/464a75_b60e2ca2a7be4f57bc05b27a2f1845f1.pdf?index=trueIn PDF document text
    • http://pujumek.myartsonline.com/us_navy_civilian_pay_grades.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35968d1c-ce3a-4fd5-b864-d0b5736f3910/54003072714.pdfIn PDF document text
    • http://liraperuwuw.atwebpages.com/jiregusesemaxa.pdfIn PDF document text
    • https://77a5c3e7-429a-4f60-ad30-886abaef4f6e.filesusr.com/ugd/07a1ab_ffe5ccf114fa48e680cad58ad11ebf42.pdf?index=trueIn PDF document text
    • https://7a9095e9-4ba3-4ff7-9406-a75d0382ce8a.filesusr.com/ugd/db93e9_af9490907f1349e8a8bde4f1da3eb7c1.pdf?index=trueIn PDF document text
    • https://976edc35-935c-46de-9e6e-e225dbc25668.filesusr.com/ugd/0829d8_b115af4d53d846b0b80902af6164cba8.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11393 4972 bytes
SHA-256: b4886b2e438aa6c29b0704e61d1a7a70a05e78fd2b66b65bbddbef0ea63bcacb
font_01_sfnt_off00012498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12498 12080 bytes
SHA-256: 93bf0b23bb92caf45e630f69e4ad7ee41904750dcf5052f05fe9ced43f45f5ce