Malicious PDF — malware analysis report

Static analysis result for SHA-256 68a079a0cc66ff01…

MALICIOUS

PDF

76.8 KB Created: 2020-11-16 17:18:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 10bbb1669dbb38cec64ab8fa83a90645 SHA-1: 77e239dfe4890e17f2b4e9a6cb55aadaf9f2b641 SHA-256: 68a079a0cc66ff01eaf13913e372a907f3ddb49e768de91b108a06e53eaa3ba8
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links, with at least one identified as a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' strongly indicate a malicious intent to lure users to external, potentially harmful, sites. The ClamAV detection and ML classifier further support the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/aws?utm_term=brand+guidelines+mockup In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381102/normal_5f91566355aa2.pdfIn PDF document text
    • https://laxuruvu.weebly.com/uploads/1/3/1/4/131482832/3425761.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378157/normal_5f96c579b3afe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365594/normal_5f8d4788a9c43.pdfIn PDF document text
    • https://dosaremuxabibi.weebly.com/uploads/1/3/0/7/130739916/wutinebapiga_daparumiza_vereneleba_padomelofuwaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/35243329686.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/zutelufexutilutop.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/47686685785.pdfIn PDF document text
    • https://s3.amazonaws.com/mewezekilafef/jabarerosuwitedisof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aef8b02a-36f9-43a1-a158-1248f872535b/sex_love_rock_and_roll_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/32049592203.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/eddie_bauer_stroller_owner_s_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/wufomozidijuge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7111dc6e-f82b-4090-91ec-22d4ed63e4c0/6556974847.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_off0000ef7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7C 5508 bytes
SHA-256: 88cf7d455b3ad4129097a283205fb203ae40f39c685fcfbf2dd229f5681e95ac
font_01_sfnt_off00010224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10224 10800 bytes
SHA-256: bdd1f884fcdfd1ffca4dbc500e619c339875d181e910b106c3ba37cad9bd498d

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