Malicious PDF — malware analysis report

Static analysis result for SHA-256 6919da929db2fb2d…

MALICIOUS

PDF

74.5 KB Created: 2021-04-17 00:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd6f7bfcdcb0686ac98833fb220be1a3 SHA-1: 1ae721252d23c2bc96a495bb5c53574a30d3a1b0 SHA-256: 6919da929db2fb2dfc36c27bed7f0c0ee0016746bac05aa8c01f52c2d67cd532
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, flagged as a 'PDF_SEO_LINK_FARM', with one primary malicious URL identified. ClamAV and ML classifiers also strongly indicate maliciousness. The embedded content appears to be obfuscated or corrupted, but the presence of numerous external links suggests an attempt to redirect users to potentially harmful sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/strik?utm_term=what+fluid+for+aisin+transmission
    • https://nopeludaseji.weebly.com/uploads/1/3/3/9/133986928/8934649.pdf
    • http://blancer.xyz/unity_stock_price_todayo3f74.pdf
    • https://dejalujufoleto.weebly.com/uploads/1/3/1/3/131378776/varanupegaxarofu.pdf
    • https://jasebezaf.weebly.com/uploads/1/3/4/6/134630561/3e6fbbd249b0a49.pdf
    • http://segway-wheelchair.ru/abc_tracing_sheets_for_preschoolers0psyz.pdf
    • http://redpandarecycling.com/wing_chun_1994_full_movie_english_downloadj3nzh.pdf
    • http://sowakowakemim.mygamesonline.org/building_valve_amplifiers_2nd_edition.pdf
    • https://pujuwofox.weebly.com/uploads/1/3/4/8/134882524/joxegogola.pdf
    • https://dogamoduxex.weebly.com/uploads/1/3/4/4/134481485/dddb69.pdf
    • http://zisuroto.mygamesonline.org/nikon_f5_review_youtube.pdf
    • https://gipafefigemer.weebly.com/uploads/1/3/4/0/134097902/vodelakobe.pdf
    • https://nosavarugogitov.weebly.com/uploads/1/3/4/4/134488680/83567.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5c388bd6-7f6f-413f-a783-2416e1e28fea/xoneviresamorubu.pdf
    • https://uploads.strikinglycdn.com/files/8633622c-fa6b-4330-af21-b08e585a901b/volivopu.pdf
    • https://uploads.strikinglycdn.com/files/7b658382-5404-4ae4-879f-2a15b71454f8/descargar_la_biblia_latinoamericana_gratis_en_espaol.pdf
    • https://uploads.strikinglycdn.com/files/631d4086-a9ce-41b2-930b-8ceb30fedb1e/wudagesovunowujebuvopuwe.pdf
    • https://uploads.strikinglycdn.com/files/d0b0aabe-92c8-4d79-a535-0534d0179699/74870683711.pdf
    • https://uploads.strikinglycdn.com/files/1ded5d5b-20d9-465e-ab92-6d49357e6da0/petting_zoo_farms_near_me.pdf
    • https://uploads.strikinglycdn.com/files/73905458-ea2d-4e47-a475-d4abccbd991a/3234329711.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e869.bin
6a0ba552800501e320a766f9e65019be9fb5a72a48c330711ff9d3f6710cd9c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE869 5160 bytes
font_01_sfnt_off0000f9da.bin
d80bbf505e8850fa431630f03e0aa94001a41bfa5be80a26ff688888c78504d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DA 10192 bytes

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