Malicious PDF — malware analysis report

Static analysis result for SHA-256 02950d0df4bd24ee…

MALICIOUS

PDF

69.7 KB Created: 2020-11-24 07:00:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 57d5961a6245b05d3051756fc1f5e7ce SHA-1: b8b153a1c92665c9bc66a2e1c25a52d24da2791f SHA-256: 02950d0df4bd24ee16e7591fcf73dee0a466d4b345b553b415fea73836ed7fb6
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV and ML classifiers flagged this as malicious, specifically as a phishing trojan. The embedded URLs suggest a potential redirection to malicious sites or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/aws?utm_term=3d+max+modeling+tutorials+pdf PDF link annotation
    • https://fejamelaluboj.weebly.com/uploads/1/3/4/3/134311679/pifanodajoxukafa.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/kobidozoxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380403/normal_5f9bba192147f.pdfIn PDF document text
    • https://relugudikovok.weebly.com/uploads/1/3/4/2/134265752/6882967.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450045/normal_5faf41c283baf.pdfIn PDF document text
    • https://luvepuxoworusoj.weebly.com/uploads/1/3/4/6/134660421/kodinukiwekijobafis.pdfIn PDF document text
    • https://bilopoxowug.weebly.com/uploads/1/3/4/4/134439404/8a506ad1662fa8.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/756fe76baa5a9a0.pdfIn PDF document text
    • https://rovivivaju.weebly.com/uploads/1/3/4/3/134313680/fosir_puzegewomafos.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/efbd29fa-c161-4d17-8b30-fe3638887d06/premier_student_loan_center_irvine_ca.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3782f0f-28ff-401b-bd7b-baf6c5c806b3/mudosotemifogawumit.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/72199144247.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_off0000d553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD553 5500 bytes
SHA-256: 530ddf25befef4039416eaf235835ad950c01a975d0c4e786c8e5fd9e8f07b47
font_01_sfnt_off0000e7f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F2 9912 bytes
SHA-256: 373d38196b913b3dfa6486e370d9455934e0bc5ad735d2e68073307f5b4b1952

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