Malicious PDF — malware analysis report

Static analysis result for SHA-256 206c8746994bc3d1…

MALICIOUS

PDF

60.5 KB Created: 2020-11-21 07:55:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 23fd30a93457c424dd69946823072a46 SHA-1: 9bda270b38f65548322e467bdf2003bf0f68dd01 SHA-256: 206c8746994bc3d1491e057b16c9dd06d38a615c364f675738bf2b430c87c33a
156 Risk Score

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 0.9996

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://traffine.ru/123?utm_term=old+yellow+bricks+tattoo+haarlem PDF link annotation
    • https://femulonatif.weebly.com/uploads/1/3/4/5/134501650/verefizejuwus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373522/normal_5f93b806402b5.pdfIn PDF document text
    • https://zimiduninu.weebly.com/uploads/1/3/1/6/131637103/53a4596c090b841.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425211/normal_5fa5667e003ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419818/normal_5f9fdb59406fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414680/normal_5f9d85f4f1e47.pdfIn PDF document text
    • http://www.Dianatattooart.nlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/95237103333.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/java_full_stack_developer_sample_resume.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/83431261041.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/marley_station_mall_movie_times.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/analog_trip_eng_sub.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/car_bass_music_song.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/nodarudagaragugomedamuf.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b0d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0D0 5604 bytes
SHA-256: bbdb976b01b4e4a827234dd4010c96477439ef9908986558676f0ef55874b7ec
font_01_sfnt_off0000c3c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3C6 9932 bytes
SHA-256: 2896f68fd45058deaa7ce5f1dbffc4fdfb99e69a43cf383e1ec6ea3a439136bd