Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0c1ed8bfc37b0f0…

MALICIOUS

PDF

70.8 KB Created: 2021-02-25 18:28:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fedc8332f3e4decdb492094e335e88e6 SHA-1: 1762d4b613683c2d550fc988e3f15484653e8377 SHA-256: e0c1ed8bfc37b0f052520f7f083a6d5d561a1875d0f3c45011a9e028ae1bba0d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/123?utm_term=marathi+movie+script+format+pdf PDF link annotation
    • https://cdn.sqhk.co/limizolaxa/d8ghh5V/84510309476.pdfIn PDF document text
    • https://cdn.sqhk.co/kokedipemi/hi9EhaU/backwoods_survival_guide_magazine_back_issues.pdfIn PDF document text
    • http://kfnwejfnkwheklf.space/fifuxowevagesurevufmu65b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443821/normal_5ff7c2c5b8a7f.pdfIn PDF document text
    • https://ponegibafuzixi.weebly.com/uploads/1/3/1/4/131406662/1875858.pdfIn PDF document text
    • https://fobanuvoba.weebly.com/uploads/1/3/1/6/131637247/vojix-boruxisuju-tevetolam.pdfIn PDF document text
    • http://stavki-na-sport.site/what_are_the_characteristics_of_transition_elementsku320.pdfIn PDF document text
    • https://cdn.sqhk.co/dejuxafe/6PUDzkj/88634050043.pdfIn PDF document text
    • https://lipuriwos.weebly.com/uploads/1/3/5/3/135325722/daxisanevilom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tawenaxogiminax.epizy.com/7_little_words_answer_bonus.pdfIn PDF document text
    • http://denakisewir.epizy.com/sekiro_true_corrupted_monk_guide.pdfIn PDF document text
    • http://dimebuturerab.epizy.com/e_waste_management.pdfIn PDF document text
    • http://jipuzekas.rf.gd/liketotetoxi.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_off0000d76d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD76D 5428 bytes
SHA-256: 5cf200a8bb4a241d3c5bd4986634fb8fd7b6beb873d8bc4d6e1379797f750319
font_01_sfnt_off0000e9cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CB 10916 bytes
SHA-256: 92e52fe4f5130b9cc8da8ced229d1a869e052f10854dfaa863b165873f22e9d5

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