Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac9270b90bf60524…

MALICIOUS

PDF

97.8 KB Created: 2021-01-16 18:24:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: daef3a02c03757d3158742b0463b4a75 SHA-1: 94da0eae09b225ddbb02a428174f6f2dacb3de29 SHA-256: ac9270b90bf605243cb64fcb114459183af2c4d8c1ddcf0348dea1ac65247416
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 0.9998

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://trafffe.ru/123?utm_term=summoners+war+co+water+death+knight PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450240/normal_5fea2e60426ad.pdfIn PDF document text
    • https://situtewazugigev.weebly.com/uploads/1/3/4/2/134265876/levimolu-nasevu-mibupevakilavim.pdfIn PDF document text
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/paneli_tegeneb_dapasurosimes_jabozoka.pdfIn PDF document text
    • https://site-1205776.mozfiles.com/files/1205776/vogurogukexidap.pdfIn PDF document text
    • https://naruvemekojesez.weebly.com/uploads/1/3/4/6/134685524/lomikomabeluk.pdfIn PDF document text
    • https://wigitofeza.weebly.com/uploads/1/3/2/6/132682623/dejalu-xofimen-mulukowesusan.pdfIn PDF document text
    • https://site-1179563.mozfiles.com/files/1179563/giant_shark_australian_news_reporter.pdfIn PDF document text
    • https://jisiresofuwidi.weebly.com/uploads/1/3/0/7/130739297/4740364.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368468/normal_5f91ce0a32c58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385847/normal_5f8d4bcdec7ba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tarajix/torex.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/into_the_storm_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/vinejivunitego/bikhre_moti_islamic_book_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/traffic_rider_game_app.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/harvard_business_school_lego_case_study.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/tupi_2d_animation_software_free.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
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000127cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127CF 5580 bytes
SHA-256: 0d90815a7fc0277cbf0dc9436310feeccaa12e5824932dd677bd2957a70745d0
font_01_sfnt_off00013aa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AA8 12224 bytes
SHA-256: 9efb10c51b44a97255b3309cee1c0827f07b90ba171acf4e89e59755332435cb
font_02_sfnt_off00016433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16433 16128 bytes
SHA-256: 6a52288e644f3efb57504a5aaa039842bd206b1d36b89de854699aab9295f499

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