Malicious PDF — malware analysis report

Static analysis result for SHA-256 84bbb48d3815b124…

MALICIOUS

PDF

75.0 KB Created: 2021-01-19 15:01:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 1dc31cdce51e2271bea3778f7721f63c SHA-1: 379672553c60dfeacef78bb807a44ebd97e1257b SHA-256: 84bbb48d3815b1240bd6dd70476d6424d4533a4244e962253300bac819a372ea
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing indicating it links to known malicious redirector infrastructure, specifically `https://traffmen.ru/123?utm_term=oprewards+hack+2020`. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious redirector URL suggests the document is designed to lead the user to a phishing or malware distribution site, likely disguised as a reward or job opportunity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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/123?utm_term=oprewards+hack+2020 In PDF document text
    • https://cdn.sqhk.co/wojusipi/fY827DG/71423438435.pdfIn PDF document text
    • https://cdn.sqhk.co/jabupexipa/94RY8Do/displacement_vector_calculator_3d.pdfIn PDF document text
    • http://xudogiborijum.66ghz.com/muwavotiwexuk.pdfIn PDF document text
    • https://cdn.sqhk.co/kululojilo/zhThghd/subway_vegansk_dressing.pdfIn PDF document text
    • http://fufodew.22web.org/zururowipopumivulusilutog.pdfIn PDF document text
    • https://cdn.sqhk.co/xexisini/P3ghggm/arcade_defender_handheld_game.pdfIn PDF document text
    • https://cdn.sqhk.co/fowijuseziju/5P8fNhf/92462124084.pdfIn PDF document text
    • https://jovinafunen.weebly.com/uploads/1/3/2/6/132695325/2943419.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/takateg/popcorn_gift_card_holder_template.pdfIn PDF document text
    • http://dedamedasobime.epizy.com/juzudujovutovajeg.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/business_information_technology_job_description.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/round_midnight_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/larajimarifekinorul.pdfIn PDF document text
    • http://zisafaziga.epizy.com/7798725135.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/wolesotaxevemed.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_off0000e72b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72B 5584 bytes
SHA-256: 15fcd2c7256c3ec36df5256a5c8368eba547cb0b29029105ff17a009fc88985b
font_01_sfnt_off0000fa36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA36 10876 bytes
SHA-256: c8d51580059f62f57d5331bd6ed9a332f508a65f61f4e257ef4a3cbc6d85c35e

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