Malicious PDF — malware analysis report

Static analysis result for SHA-256 bff9b97e6038d281…

MALICIOUS

PDF

76.4 KB Created: 2021-02-27 21:13:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 4130d95403c5bcd5a4b15d1d8b1a9d6b SHA-1: 43f3b46ec5b309c7a82dce0a1181eac31dccc2f0 SHA-256: bff9b97e6038d28125342d1ed9124ac2a14d8191e79427067ae8acd296da268c
156 Risk Score

Malware Insights

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

The PDF contains a lure for "gta 5 money hack ps4 online no survey" and an embedded URI pointing to a malicious domain. ClamAV detected this file as Pdf.Phishing.Trojan, and a critical heuristic identified a large farm of external PDF links, suggesting a phishing or scam campaign. The document body, though heavily obfuscated, contains keywords related to the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://pelibifir.ru/wix?keyword=gta+5+money+hack+ps4+online+no+survey PDF link annotation
    • https://jawemojope.weebly.com/uploads/1/3/4/3/134399256/kavojuwulinibivera.pdfIn PDF document text
    • https://cdn.sqhk.co/jobiwokojo/6ifHjj0/jivivizot.pdfIn PDF document text
    • https://cdn.sqhk.co/wajewukudino/agf0jj5/pofur.pdfIn PDF document text
    • https://cdn.sqhk.co/fudamozomeb/njabdBE/sitijapupolazaboridenoza.pdfIn PDF document text
    • https://cdn.sqhk.co/nokodexuxof/Niihchh/banco_bradesco_stock_price.pdfIn PDF document text
    • https://gasimela.weebly.com/uploads/1/3/1/3/131398285/c1f195967a942.pdfIn PDF document text
    • https://tilawifi.weebly.com/uploads/1/3/4/4/134480999/3370726.pdfIn PDF document text
    • https://jodalutuz.weebly.com/uploads/1/3/4/4/134444421/8171188.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/jukezeluf/emerald_cinnamon_roasted_almonds_nutrition_information.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/balance_sheet_sample_for_small_business.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/70501613146.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/bluestacks_offline_installer_for_pc_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/duffy_mercy_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/vasomedazuwuzel.pdfIn PDF document text
    • https://s3.amazonaws.com/dipafuxe/segajezet.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/baarish_yaariyan_mp4_hd_song.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/unit_vector_transformation_from_spherical_to_cartesian.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/bad_blood_lyrics_song.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC79 5640 bytes
SHA-256: 4f2de178ee7233afab40599dc5b65004b521f8ab5051785c1c2d54765cabc028
font_01_sfnt_off0000ff97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF97 10852 bytes
SHA-256: cc3402bc36abed1afa9d9938ddd24d50d6c66426f8d4085d05b3ec2121dc9843

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