Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e83f86c4a0daadf…

MALICIOUS

PDF

79.3 KB Created: 2021-01-06 05:07:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4e82744bccc09b54be43b6bb5aad7237 SHA-1: 759d63e1ebaede5955bd5894cd4ff432062cbd77 SHA-256: 7e83f86c4a0daadf60455b55728c8fdd0bb63fc1133c96662333148b89817818
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic firing for a malicious redirector link to 'traffmen.ru'. Another critical heuristic indicates a PDF link farm, with many URLs pointing to external PDF files, suggesting a phishing or malware distribution campaign. The ML classifier also strongly flagged this PDF as malicious.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/aws?utm_term=firefox+app++location In PDF document text
    • https://velulaganivuvoj.weebly.com/uploads/1/3/4/4/134438708/5578243.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454668/normal_5fddcaeb98e12.pdfIn PDF document text
    • https://rajofike.weebly.com/uploads/1/3/4/5/134500595/0293244280.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381294/normal_5fa374db76864.pdfIn PDF document text
    • https://cdn.sqhk.co/nazopekujavi/ifhiBic/15918818812.pdfIn PDF document text
    • https://ruwatavefi.weebly.com/uploads/1/3/4/7/134704280/wixexozagokesaxaxix.pdfIn PDF document text
    • https://tedomidile.weebly.com/uploads/1/3/2/7/132712102/7516425.pdfIn PDF document text
    • https://cdn.sqhk.co/wefenosefob/bbijjaq/lego_super_mario_adventures_starter.pdfIn PDF document text
    • https://cdn.sqhk.co/jagapifa/0KCgfhe/a_dark_dragon_ad_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/netesatova/R5CLpGA/best_air_war_games_pc.pdfIn PDF document text
    • https://xuwajaxupix.weebly.com/uploads/1/3/1/4/131407635/2cf011b.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/pukiza/john_cleves_harrison.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/mens_formal_wear_online_south_africa.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/conjuguemos_preterite_tense_all_verbs_2_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/68235935276.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/lafuwotenono.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7c51cf8-5972-4e17-a85f-1dec963555a4/table_topics_ideas_creative.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_off0000f7d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D5 4852 bytes
SHA-256: bc6a6c9672c944ad83d38f61344144d7045fe259146c15b7f05304efa31107f9
font_01_sfnt_off00010870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10870 11896 bytes
SHA-256: 1c86394a9e615c9f936a3a21559874b071087da4012b008479b924c7678f5da5

Open this report in the interactive analyzer, or submit your own file for analysis.