Malicious PDF — malware analysis report

Static analysis result for SHA-256 c884108160c7d4f0…

MALICIOUS

PDF

67.0 KB Created: 2020-11-14 14:49:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a6992c808b1175febc260b9501fd9a4e SHA-1: c7ce961cf922cc578a9c3ba193b4584186529f23 SHA-256: c884108160c7d4f0e76fd073a6e683bc9b9fc329eb25da7aa8bbb7a625ffc15b
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by multiple heuristics and an ML classifier. It contains a link farm with numerous external PDF links, including one pointing to a known malicious redirector. The document body, though obfuscated, suggests a lure related to 'Jcpenney associate kiosk', potentially a phishing pretext. The presence of embedded URLs and the overall structure indicate an attempt to redirect the user to malicious infrastructure, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=jcpenney+associate+kiosk In PDF document text
    • https://nurifekuti.weebly.com/uploads/1/3/4/5/134516663/cfaf731e06.pdfIn PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/6407067.pdfIn PDF document text
    • https://wikexedijul.weebly.com/uploads/1/3/4/6/134659224/boguvome-tabujukaluw.pdfIn PDF document text
    • https://gatilavim.weebly.com/uploads/1/3/4/3/134391542/jawafopu-gusubuxifufiz.pdfIn PDF document text
    • https://kotidirexi.weebly.com/uploads/1/3/4/3/134358756/fanaful_vulejubo.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/kizugokofo/22935477590.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/bijijapuwegevuwanabado.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/96380695999.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af13f4bf-1d72-41e6-8d5d-ce8724e73136/75596548767.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5326535e-f20b-41cb-aec8-eddfb34eb199/82025757330.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/knuffle_bunny_2.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/optima_battery_charger_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/kebifisesaguxapuvanuwakax.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_off0000c918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC918 4956 bytes
SHA-256: a202bd3bcdd76fd99d4f84b4075093aa89cc96d1f44f10d7d6692202319ed1b6
font_01_sfnt_off0000da1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA1D 11032 bytes
SHA-256: bca5d031041886ab52cf0738fab385e6362d6aea709814e4aa6aa229bab2bb5d

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