Malicious PDF — malware analysis report

Static analysis result for SHA-256 0995b368b210099b…

MALICIOUS

PDF

64.4 KB Created: 2020-11-14 01:39:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 75a00f4d2c8874ebb703bfbe79c36899 SHA-1: d5ea9398b722f12717dd62c7add1c32deeac96fc SHA-256: 0995b368b210099b37db1c5f99c3c339275a6e2241709c2457938d8ebb10940e
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/strik?utm_term=eclass+uccke+hk+login PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379601/normal_5fa11ccef04af.pdfIn PDF document text
    • https://rosojuvawava.weebly.com/uploads/1/3/4/7/134719385/6b0d8bcfaba3f.pdfIn PDF document text
    • https://migirebunimalab.weebly.com/uploads/1/3/1/3/131383914/8ca0bf3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368266/normal_5f9238f6ec521.pdfIn PDF document text
    • https://mabulibatelirip.weebly.com/uploads/1/3/4/5/134597637/2792213.pdfIn PDF document text
    • https://xibedawik.weebly.com/uploads/1/3/4/5/134584063/dararikulek_zufomuj_nilasigox_satedikag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367312/normal_5fa90ef5ebf0f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kujapomib/elk_burgers_in_denver.pdfIn PDF document text
    • https://s3.amazonaws.com/tosasugokod/33866265356.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/7121869368.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/79962895013.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02764fa7-4c13-46f7-adc7-e50b394fe0c8/nikkormat_fs_manual.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aa38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA38 4788 bytes
SHA-256: 713c22a6e0afa23bc6d057b02b542f044f675d060c3d7af22171cccaa627e9de
font_01_sfnt_off0000ba69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA69 1688 bytes
SHA-256: db618bdb87025e7be6bb378d24314405f89c0b1cc12281bb12a913ea23ef3799
font_02_sfnt_off0000c2d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2D0 10544 bytes
SHA-256: 795c94e98f38a251e23f5d994deacb2a3df09d36294e4b16b5af46ebc923bc81
font_03_sfnt_off0000e6df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DF 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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