Malicious PDF — malware analysis report

Static analysis result for SHA-256 e78386bd530bfe84…

MALICIOUS

PDF

76.9 KB Created: 2021-02-15 13:41:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 346df6fdd4fad55944dbdbdadc6e3736 SHA-1: d0f8337a726f0ca318332c59f72f87952363ddf9 SHA-256: e78386bd530bfe842cecbebaec6db41097b755dd6264b65f362bfef6804dc46b
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains a large number of embedded external links, a common tactic for phishing or SEO spam campaigns. The presence of these links suggests an attempt to redirect users to potentially harmful websites.

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://jottigo.ru/strik?utm_term=who+manufactures+magic+chef+microwaves PDF link annotation
    • http://videohost.space/nukefobatijigulezolu2lub2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476924/normal_60126467d9c3a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376850/normal_5ff5b61c7d848.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530990/normal_5fd073be16c07.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465690/normal_5fe4189cb0acd.pdfIn PDF document text
    • http://sponsor.rest/jump_zombie_chapter_250mz49.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403143/normal_60016e6049aa0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489415/normal_601b82eebb985.pdfIn PDF document text
    • https://tudimase.weebly.com/uploads/1/3/5/9/135985307/kalus.pdfIn PDF document text
    • http://shishkin-seed.xyz/gaxoxasafuzaxomevovfecff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393637/normal_601f9e3918286.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379498/normal_6007e3e8e6bdd.pdfIn PDF document text
    • http://rafale.store/demet_akaln_koltuk_mp3_indirm2ijy.pdfIn PDF document text
    • http://mazanatur.space/understanding_human_communication_13th_editionlvc5q.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424025/normal_5ffd142881fae.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/xezonijida/rewrite_the_stars_piano_guys.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_off0000ec72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC72 5428 bytes
SHA-256: 84f6db00d56e3ae5a71a6f6d0072fb72c6adf19a7731bc48f1c1ae265f7a21fb
font_01_sfnt_off0000fede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDE 11552 bytes
SHA-256: 613a3c4c7ce9ecb2fe3e3871b969964a0c09b7deee8eb85a945448affefbab8a

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