Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe4c5975bd4dda45…

MALICIOUS

PDF

70.9 KB Created: 2020-12-26 03:06:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 235e790e105f08361589c15cea49acc1 SHA-1: d8c0af522f5b0cdaf739b13fff35b357f9e509cf SHA-256: fe4c5975bd4dda45e9ff7f3c54af8e42a4db7e7b3d950d5ac6f4015ab3bbb0a0
214 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious sites, masquerading as job search results. The presence of multiple embedded URLs and a critical heuristic firing for malicious redirector links strongly suggests a phishing or malware distribution attempt. No scripts were extracted, but the document's structure and embedded links are indicative of a malicious intent to compromise users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://cctraff.ru/strik?utm_term=cruise+travel+agent+jobs+near+me In PDF document text
    • https://static.s123-cdn-static.com/uploads/4416136/normal_5fc4ad3a1d870.pdfIn PDF document text
    • https://robitejipesiz.weebly.com/uploads/1/3/4/3/134375849/38064.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403537/normal_5f91e8f4e4773.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383304/normal_5fc5e7034d7e5.pdfIn PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/3512421.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374703/normal_5f8d450f257b9.pdfIn PDF document text
    • https://cdn.sqhk.co/bepasasa/hj0jjdE/96277359928.pdfIn PDF document text
    • https://wawodupalise.weebly.com/uploads/1/3/4/6/134621762/kikupeka-linelovuz-waxasoval.pdfIn PDF document text
    • https://roxowuvunesoneb.weebly.com/uploads/1/3/4/8/134889799/sejariduwov.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvomuvugu/Mhb6Igi/29158402468.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369486/normal_5f8fff73d8a07.pdfIn PDF document text
    • https://cdn.sqhk.co/xafileme/hhOihib/bemikesakanumab.pdfIn PDF document text
    • https://cdn.sqhk.co/zatugudaxaji/ihghggW/3153609689.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d7f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F2 5188 bytes
SHA-256: 1ac5a8cc5bc850529ca258f0d4c42d06dda517f75c2f5025ca2239f25d2538a7
font_01_sfnt_off0000e98b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE98B 10972 bytes
SHA-256: b7adf0f5b2b5ff8c311f7f6e05573105bfbeab39fb7cbf485dc0e31da43d166f

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