Malicious PDF — malware analysis report

Static analysis result for SHA-256 01c3367c953ac60e…

MALICIOUS

PDF

97.3 KB Created: 2021-02-02 11:07:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 286552d936662b6fad0870c03c14a07b SHA-1: c0a2aa07b7faf0e27bf3df96b5815e97abc8ca9e SHA-256: 01c3367c953ac60e8c998b972f33ea1158fc4bd2ebe426abf35652482d8ea0c1
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/aws?utm_term=android+x86+emulator+windows'. This indicates the document's primary purpose is to lure the user to this external resource. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence for a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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.
  • 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://yafferge.ru/aws?utm_term=android+x86+emulator+windows In PDF document text
    • https://static.s123-cdn-static.com/uploads/4374983/normal_5fe2e9129f49b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380230/normal_6006a8bc4b45f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413469/normal_5fe95c685bbdd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382196/normal_5fc7ee0ce2b45.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490133/normal_6003f898044a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465147/normal_5fee26680fa09.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447450/normal_5fe0c2c5c3284.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411714/normal_5fd05f0a19909.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411931/normal_600d974f24e12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487905/normal_600cfb59d7017.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478146/normal_5fdae33c14c9f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413119/normal_60030c9c474e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411231/normal_5fd6524d2ed10.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://fejukuvazov.rf.gd/9023309395.pdfIn PDF document text
    • http://pabadebaluke.rf.gd/government_daily_nutritional_guidelines_uk.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6F 22596 bytes
SHA-256: acdfad8f392dc60b62bacd2afef9ffdaa5b3ec9d836a6896dc438e5eb42e60ab
font_01_sfnt_off00012787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12787 5468 bytes
SHA-256: 3fff02bb00124753e4a539d291ed929aaa492dcef9b16e2611853bbc9fa2d82a
font_02_sfnt_off00013a10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A10 8360 bytes
SHA-256: 6b2bafafb6804f9f21c9276216c003ee22d8533bc6ab59ec91c82fc051687ede
font_03_sfnt_off00015165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15165 11740 bytes
SHA-256: 005bc729972dd9b49f975a2d6a2bc9af08d5be919fddac19d3253803606b5d3c

Open this report in the interactive analyzer, or submit your own file for analysis.