Malicious PDF — malware analysis report

Static analysis result for SHA-256 f194d32e99effef8…

MALICIOUS

PDF

76.5 KB Created: 2021-01-01 23:26:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7cf3f6b03d7dd2957d8654907181f276 SHA-1: 8a0a9bbca31619046a19297a75e61c615bd60982 SHA-256: f194d32e99effef8fd5cf093eafa0478b81626e2519958256d87b05902179f0a
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to disposable hosting services and appear to be part of a link farm. One critical heuristic indicates a direct redirect to malicious infrastructure. The ML classifier and ClamAV also flagged this file as malicious, suggesting it is designed to redirect users to harmful sites, likely for phishing or malware distribution.

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://cctraff.ru/123?utm_term=apush+definition+of+full+faith+and+credit+clause In PDF document text
    • https://gobumireg.weebly.com/uploads/1/3/1/3/131383916/zasebadijupa.pdfIn PDF document text
    • https://nexawukuvinu.weebly.com/uploads/1/3/4/5/134578226/e1cc2c6.pdfIn PDF document text
    • https://zebazowis.weebly.com/uploads/1/3/4/3/134310266/7e51ee.pdfIn PDF document text
    • https://cdn.sqhk.co/tarozawowe/gcieLjh/royal_caribbean_cruises_alaska_2021.pdfIn PDF document text
    • https://xosotujusosevo.weebly.com/uploads/1/3/4/3/134377620/pepedutixi-subefo-ruxulajel.pdfIn PDF document text
    • https://salexutoxor.weebly.com/uploads/1/3/4/7/134761189/8071824.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448556/normal_5fd763731dc80.pdfIn PDF document text
    • https://cdn.sqhk.co/sevafeluba/Thf83jf/collage_maker_online_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389581/normal_5fdb56221ca5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449965/normal_5fbd952d457e3.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/jukos-wewatinexa.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/jinitorip-bolag.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370540/normal_5fe0f0e9b9e9f.pdfIn PDF document text
    • https://nizomepovunamox.weebly.com/uploads/1/3/4/3/134305669/c17adec0826677.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4527747/normal_5fc7e451c0dc1.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD949 5232 bytes
SHA-256: 87cbd9d84ff4e48b79f6a01b085356bbadcf8aec607e9d58a81dca7fea5f1443
font_01_sfnt_off0000eb12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB12 10376 bytes
SHA-256: 22cd6c8c87b579b7ce9f709fd45554cbc6a09533cddfbb228ae526f186404a35
font_02_sfnt_off00010ee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE1 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15

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