Malicious PDF — malware analysis report

Static analysis result for SHA-256 658a3fe7b27c25e8…

MALICIOUS

PDF

75.3 KB Created: 2020-12-25 16:51:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 303a3d23cf70a91da9b8438a12f7dd60 SHA-1: de0b5073fb6aebfe20cef1684c62ea8c2b200997 SHA-256: 658a3fe7b27c25e89fac065a85214c9d4f548a7d8857efa3311d7ad7f794cdd6
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to a product review, suggesting a phishing or malware distribution attempt. The presence of multiple PDF link farms indicates a coordinated effort to drive traffic to potentially malicious content.

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/123?utm_term=honeywell+lyric+t6+pro+wifi+review In PDF document text
    • https://cdn-cms.f-static.net/uploads/4419827/normal_5fdc178e56690.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426060/normal_5f98e14e33b21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366976/normal_5f910145c2970.pdfIn PDF document text
    • https://dofukuligofevo.weebly.com/uploads/1/3/4/8/134869200/kujinu.pdfIn PDF document text
    • https://nopiwevupemaro.weebly.com/uploads/1/3/4/6/134653234/df5837bb9e26.pdfIn PDF document text
    • https://cdn.sqhk.co/bojojiweg/dhdigy4/47882840229.pdfIn PDF document text
    • https://cdn.sqhk.co/gagufatemo/Tgfjerj/28010908628.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392191/normal_5fd6446f2edf3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447095/normal_5fb5ea2a4f744.pdfIn PDF document text
    • https://cdn.sqhk.co/sekeniti/ShiSjht/acceleration_formula_to_find_final_velocity.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475715/normal_5fb4356b4e1c2.pdfIn PDF document text
    • https://cdn.sqhk.co/bawivurolut/PCPibFn/nail_designs_coffin_black.pdfIn PDF document text
    • https://cdn.sqhk.co/norifasil/ge7ZjdE/buzenunuxog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdac24e7-73aa-4b67-9060-18788375aeca/reviews_on_the_metabolic_factor.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/27855422533.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_off0000e895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE895 4988 bytes
SHA-256: 2a48e2f1c27ee9bcdb0963e50fac1ebc4e99d0414ffd100e424fede6262ea571
font_01_sfnt_off0000f9c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C4 11264 bytes
SHA-256: 6db71253166ac5113dce706688a8218086a302e3818e06ca09fd599d24aef1c9

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