Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea3fed8fe6733b06…

MALICIOUS

PDF

69.3 KB Created: 2021-01-25 07:59:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 6d3dbb0ac10e991bba043eb553b7f336 SHA-1: 28459d5cb28cead0e93cb5d532da85a940badd56 SHA-256: ea3fed8fe6733b06d8f713144677a203520148e69f4e0b6b6e55840d3bda678a
244 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many pointing to disposable domains and one identified as a malicious redirector. This suggests a phishing or scam campaign aimed at directing users to malicious sites. The ClamAV detection and ML classifier further support its malicious nature.

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
  • 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.
  • 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.
  • 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://traffmen.ru/aws?utm_term=sixth+sense+movie++filmywap In PDF document text
    • https://static.s123-cdn-static.com/uploads/4499995/normal_5ffe603f43d20.pdfIn PDF document text
    • https://suzexefovewav.weebly.com/uploads/1/3/4/6/134640410/de699e5b87f5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381083/normal_5fc837ee2eceb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369182/normal_5fe89349d006b.pdfIn PDF document text
    • https://gurufikenifa.weebly.com/uploads/1/3/2/3/132303388/kowowov_mawotodite_putugiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481520/normal_5fd0eccd830a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379848/normal_5fdae18156c78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419415/normal_600ad6afdab5e.pdfIn PDF document text
    • https://zekufizow.weebly.com/uploads/1/3/0/7/130775694/cc18f.pdfIn PDF document text
    • https://cdn.sqhk.co/kitaparek/1TUjetr/vapefobaxibeso.pdfIn PDF document text
    • https://didekupava.weebly.com/uploads/1/3/1/1/131163833/babusefon.pdfIn PDF document text
    • https://cdn.sqhk.co/banibudofe/h4pZ8jf/xorowuxulideribeborukil.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuvedije/didFPjh/sharpen_the_saw_video_clip.pdfIn PDF document text
    • https://jamiwimavebu.weebly.com/uploads/1/3/1/4/131453695/luxepe_giwepow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459916/normal_5fe2c759e124b.pdfIn PDF document text
    • https://cdn.sqhk.co/kepebeso/D4Mjgib/23368904736.pdfIn PDF document text
    • https://teniroge.weebly.com/uploads/1/3/4/6/134693228/cb733d523cdc7.pdfIn PDF document text
    • http://gojepifega.22web.org/34545550900.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fetufebutegiv.rf.gd/calendar_planner_template_word.pdfIn PDF document text
    • http://puzegekizizovin.epizy.com/31898869642.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_off0000cebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEBF 5468 bytes
SHA-256: 5a85d354eb96d92d9d2c4a25a124abe21b3f369bbc0e47706873ecfbfb5a5dc0
font_01_sfnt_off0000e158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE158 11544 bytes
SHA-256: 99a1a9ade4e24f582ad6e5fe21552a924a2bf0c116681a8a55ce0951c99451b3

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