Malicious PDF — malware analysis report

Static analysis result for SHA-256 e71874caf76187e6…

MALICIOUS

PDF

104.1 KB Created: 2021-01-05 22:05:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a0c2ab47a7a5398ffb482b9604d2b0a2 SHA-1: 4a2bc2175ee95c8411d1c83be3485ef4afe61d98 SHA-256: e71874caf76187e6cf5e867336907fce49529b77229198799eb4557c06aa6933
134 Risk Score

Malware Insights

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

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafffe.ru/aws?utm_term=shatta+wale+borjo+song PDF link annotation
    • https://zevigetadafuwun.weebly.com/uploads/1/3/0/9/130969942/fca6bd7519.pdfIn PDF document text
    • https://tusujowifavenag.weebly.com/uploads/1/3/1/4/131453847/5141634.pdfIn PDF document text
    • https://zedurobarudavur.weebly.com/uploads/1/3/4/0/134018347/febuzatodel.pdfIn PDF document text
    • https://cdn.sqhk.co/sadisadaz/dAiihdz/gazezufinolotowe.pdfIn PDF document text
    • https://cdn.sqhk.co/gemadaruvow/tK6bZhg/vikings_season_5_review_imdb.pdfIn PDF document text
    • https://dugepenen.weebly.com/uploads/1/3/1/3/131379306/gezef.pdfIn PDF document text
    • https://cdn.sqhk.co/damukowabij/0idPhdW/hay_day_game_blueprints.pdfIn PDF document text
    • https://misodewegakev.weebly.com/uploads/1/3/4/7/134717908/negolofifusav.pdfIn PDF document text
    • https://cdn.sqhk.co/visukodo/Q3WieBd/strategyzer_canvas_value_proposition.pdfIn PDF document text
    • https://cdn.sqhk.co/purovufizu/3iijcz9/66125801770.pdfIn PDF document text
    • https://cdn.sqhk.co/xaxovowupofa/I3Eihd5/dotman_song_music_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jegisizozul/ehgjdib/69925163181.pdfIn PDF document text
    • https://sepubipig.weebly.com/uploads/1/3/4/4/134445985/9346599.pdfIn PDF document text
    • https://cdn.sqhk.co/mibajufaneja/bagcic2/kode_app_review.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/rarosaj_lemepagega.pdfIn PDF document text
    • https://wigobozigor.weebly.com/uploads/1/3/5/3/135345973/nozitatuxijevojiwex.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

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_off00012413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12413 5356 bytes
SHA-256: 4007a75d3fa5fc33dd7f6b71d851b5a303a48c054382e0a2c5c65a0002af4896
font_01_sfnt_off00013651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13651 15428 bytes
SHA-256: 47def022ab7b4f6b7d42caa8af786f89c65ab95abf71fa59461d892a658cf469
font_02_sfnt_off00014da4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DA4 13420 bytes
SHA-256: 0285827176f5bb305834eeb111987091d8938830d80ef8c3c26546be20b29336
font_03_sfnt_off0001797c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1797C 16812 bytes
SHA-256: 367513d6eed9b900e1238e657b28b1a02454b0cda1bef86ac2d1b5ad2f34a1ae

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