Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5975f8b5473e046…

MALICIOUS

PDF

93.9 KB Created: 2021-01-04 01:02:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 7c81daf0aa4310770952a67953f89a91 SHA-1: 30e0fcc6af97847d90d116b6e0e5ab784c5911b1 SHA-256: c5975f8b5473e04624e7ba3bfe306a14bc57d7e9f50e617e4214a2a1c4dbb5e8
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, specifically flagging it as a redirector link farm and a phishing trojan. The embedded URLs, particularly 'https://gettraff.ru/123?utm_term=spongebob+help+wanted+full+episode+youtube', point to known malicious infrastructure. The document's structure suggests it's designed to host numerous links, likely to lure users into clicking malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://gettraff.ru/123?utm_term=spongebob+help+wanted+full+episode+youtube In PDF document text
    • https://cdn-cms.f-static.net/uploads/4421476/normal_5fa3a25a901cb.pdfIn PDF document text
    • https://benarejara.weebly.com/uploads/1/3/1/4/131407695/9bda099160f64.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499935/normal_5ff24c1fdd130.pdfIn PDF document text
    • https://pojekemo.weebly.com/uploads/1/3/4/4/134469054/2200516.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386334/normal_5fc14d3ac0798.pdfIn PDF document text
    • https://sivusemekatew.weebly.com/uploads/1/3/4/4/134491367/7823413.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412757/normal_5fa2959766a6f.pdfIn PDF document text
    • https://dujenavu.weebly.com/uploads/1/3/4/3/134366251/8076731.pdfIn PDF document text
    • https://topizamo.weebly.com/uploads/1/3/4/4/134435864/7441696.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/239006f3-f820-44da-8190-b3fbf1cefcff/port_jervis_line_middletown_ny.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/76552340865.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/osha_evacuation_plan_template.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/samsung_s390g_unlock_octopus.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10374 5644 bytes
SHA-256: c571904369f04aacfebe12fd6a0349e08cc5819b84267ccd8d202af2c5037493
font_01_sfnt_off000116b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B6 5936 bytes
SHA-256: 8de454fe43b8d7a2429bca2bfd39078d8155280e65942b54495b88cf9017caf5
font_02_sfnt_off00012b48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B48 13020 bytes
SHA-256: 255c9b1b381dd7d5777067c8ebe7212fca7a3edf33b670be43812e1bf14a4bca
font_03_sfnt_off0001555f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1555F 16064 bytes
SHA-256: 6f17b99764d671a96c0d2fd0b5f339513c2ddbf7efa5d755f63b897ad21dd613

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