Malicious PDF — malware analysis report

Static analysis result for SHA-256 068abfd732c54312…

MALICIOUS

PDF

82.1 KB Created: 2020-11-30 20:19:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: a2ef50dae49f9c79004f9dba4a04dccf SHA-1: 13e425ecdefc8b373d376b5be67e906db239dbf9 SHA-256: 068abfd732c543122de8e9df33bf875268da0ba9fb0b09872c3835659417173b
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a lure referencing 'Black desert lahn class guide' and includes a high-risk heuristic for an SEO redirector link. This link, 'https://trafftec.ru/aws?utm_term=black+desert+lahn+class+guide', is identified as a phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://trafftec.ru/aws?utm_term=black+desert+lahn+class+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470833/normal_5fb5c0f64c4d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365540/normal_5fa8bd22467b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377410/normal_5f8b9d67d025b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386366/normal_5f9dd38235bad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385437/normal_5fb57e5594dea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485448/normal_5fbf2e58a4f52.pdfIn PDF document text
    • https://megeleju.weebly.com/uploads/1/3/4/3/134319984/69206121.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/vajefam/cse_414_uw.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/flash_adc_converter.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/9656730700.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/dozixodubixiregal.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/55433525588.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/jai_baba_balak_nath_pictures.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/88739040606.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 1

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF675 5084 bytes
SHA-256: 6a004c379d3f6c097931b8d3d0d67b69323336c920961cd0d11d5b4c3635a941
font_01_sfnt_off000107ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107AC 11032 bytes
SHA-256: 31424f84b9809c0c92540de38488e4cd02e8fc6689636712972b0671a0389d8f
font_02_sfnt_off00012d3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D3E 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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