Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d6e8d52fb856e22…

MALICIOUS

PDF

69.8 KB Created: 2020-11-29 23:18:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 461ac842843258314370b608a6aa83d9 SHA-1: 1bbf35b640d8ea421fd8ee2f9eeccc34a0c7a5c0 SHA-256: 1d6e8d52fb856e220a5475d5c686e951151d677eaaa794a0047d1f1e16d8e6d3
214 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, including a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to a fitness tracker manual. The presence of multiple PDF links and a critical heuristic firing for a malicious redirector indicates an attempt to direct users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=veryfitpro+id115plus+hr+manual
    • https://rarowovi.weebly.com/uploads/1/3/4/6/134664267/pokaguru-veluxe-melafobosab-kevaf.pdf
    • https://xesamubi.weebly.com/uploads/1/3/4/0/134095888/1202289.pdf
    • https://gonubogebedop.weebly.com/uploads/1/3/4/8/134886664/13a0280011b9d7.pdf
    • https://fovavizudaz.weebly.com/uploads/1/3/4/3/134375550/2b6eb41d215.pdf
    • https://guxadudupis.weebly.com/uploads/1/3/4/7/134751999/31432277437.pdf
    • https://rokufekajo.weebly.com/uploads/1/3/0/8/130814342/4864871.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dixaleko/22277526711.pdf
    • https://uploads.strikinglycdn.com/files/c724daa7-0f99-4e58-b72a-65e3b6c15cca/1169175154.pdf
    • https://s3.amazonaws.com/fatikonavori/tewejuwelemuranelodikokev.pdf
    • https://uploads.strikinglycdn.com/files/b9a4fed4-1d91-49ed-b841-b4e2f633b14b/zeminosopegowuk.pdf
    • https://s3.amazonaws.com/desekusoxi/multiplying_binomials_maze_answer_key.pdf
    • https://s3.amazonaws.com/rorives/emergency_medicine_hp_template.pdf
    • https://uploads.strikinglycdn.com/files/c1599766-99e5-41db-bb31-3ce47f784dfc/restore_google_authenticator.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1ca.bin
b3dcae525a23f215d36139eae879f2265105c243c14f284a9ba53f45e35c1898
pdf-font-stream PDF embedded font (sfnt) at offset 0xD1CA 5524 bytes
font_01_sfnt_off0000e47c.bin
b1faf630811698a843c65a0b8e664e5ba226d6634e27a05f372e679eb7c320df
pdf-font-stream PDF embedded font (sfnt) at offset 0xE47C 11096 bytes