Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c196a83527bf11f…

MALICIOUS

PDF

66.0 KB Created: 2020-12-21 04:46:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9bee3f1c6061a5a0d2d8433202c93bda SHA-1: 141d93e357237c58b1c9a42f7b519623c85b610c SHA-256: 1c196a83527bf11fc9d64a34803ae878b0eb3fa4c77e3a8369aacac84f102c4d
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a large number of external links, including one to a potentially malicious domain (trafficel.ru), suggests a link farm or phishing attempt. The heuristic 'SE_URGENCY_LURE' further supports the phishing pretext by indicating the document contains urgency language.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://trafficel.ru/123?utm_term=sample+nursing+care+plan+for+abdominal+pain PDF link annotation
    • https://duxojavuse.weebly.com/uploads/1/3/1/4/131483254/163300d6c94.pdfIn PDF document text
    • https://tagelararejo.weebly.com/uploads/1/3/4/8/134846357/guxobogidodixerile.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/lejivugeleguwod/viewasian_safelite_online_discount.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/13699030836.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/820e44fe-28d2-4cd7-946c-e8fe738bd4cf/another_word_for_formed_starting_with_p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94734e65-f366-4589-af66-658895235545/69177721387.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/list_of_important_days_in_indian_history.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/51793179150.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0692b760-3aa8-4ac4-a048-add827fca025/pc_isos_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdfd9daff074777c9861c88/t/5fdfeaa5ef8e407a9eb60c61/1608510118570/92664299711.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fc4ef98-b9a7-4fd9-aedd-81e2e6cf1e35/podanifazujebe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce4fa390e5b06becb65dca/t/5fd09ee7b8bf0379e60edd82/1607507688124/scary_hospital_story_mode_3d_horror_game_adventure.pdfIn PDF document text
    • https://s3.amazonaws.com/pojojagajevuxa/73633537983.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_off0000c74a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC74A 5716 bytes
SHA-256: 043f954cf385a1fe241dba194f690f37a9859990386843de5702b4390cb6770d
font_01_sfnt_off0000daa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA4 9516 bytes
SHA-256: 1e5047aa6a2f504838d646cec456e1e133eab0d7966b7ba215f902ae0b010df8

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