Malicious PDF — malware analysis report

Static analysis result for SHA-256 4769f18e04b48fb7…

MALICIOUS

PDF

72.0 KB Created: 2020-12-26 17:24:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4c42d135bf94b89dcad10f602bc9c0e2 SHA-1: 903d9ff11b45d64485e4e5707072c9dc4375b076 SHA-256: 4769f18e04b48fb79fc05d4f8c444bcc145e3a8add0a373453a8ad0c05c98abe
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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/aws?utm_term=burning+soulworker++not+working PDF link annotation
    • https://cdn.sqhk.co/kolazapikib/ejb0Bim/wakadojagazi.pdfIn PDF document text
    • https://cdn.sqhk.co/sejujona/haCVKif/word_association_game_words_list.pdfIn PDF document text
    • https://cdn.sqhk.co/gogoturowib/7jdjfgi/sky_map_fur_iphone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369782/normal_5f88c27ddcf58.pdfIn PDF document text
    • https://cdn.sqhk.co/kabevapixox/rhhoifD/dark_hero_viii_release_date.pdfIn PDF document text
    • https://cdn.sqhk.co/simunenij/Tfk7rPB/airline_tycoon_deluxe_cheats_handy.pdfIn PDF document text
    • https://cdn.sqhk.co/linigurep/ha1pjcw/parental_appointment_of_a_guardian.pdfIn PDF document text
    • https://vuguzunorofina.weebly.com/uploads/1/3/4/3/134322364/nivalav.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/35675e78-09c6-4414-ad68-b312e96021d0/darkness_comes_rattling.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1720402d-1b10-4adf-b34d-31e20abe1c05/just_dance_switch_controller_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/116a1063-a1bb-470e-a9e0-16cdaf96a547/21402710044.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d75c07f-1ee2-4318-ae98-05b9aed9a430/jar_of_hearts_chords_piano_sheet_music_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8c30f8e-46ae-4a33-8e35-e28f4a844a03/bejuxapivijusojojutuzusu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9518080-894b-490c-96ec-01dd2f3fc406/73823624592.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE60 4848 bytes
SHA-256: 8490658921d6f72ca036eeab4997db049621fa36daba78b8bccbc94a98ed5af9
font_01_sfnt_off0000ef09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF09 10644 bytes
SHA-256: 95653ca0340ce7df4f4ae5ab3147c8145dce1e90535a99946a9be2c5b019b4a2

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