Malicious PDF — malware analysis report

Static analysis result for SHA-256 019bdf1b3e7f79a7…

MALICIOUS

PDF

73.6 KB Created: 2020-12-24 14:40:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 542278743086f4dd0c9dc58868cf485b SHA-1: ef2d6e2b42ba06183e7dc0ddbb941b3886315c9f SHA-256: 019bdf1b3e7f79a7deec6242ea8c24315b28097f31d837bc3c643cee44c0d623
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting an attempt to manipulate search engine results or redirect users to malicious content. One of the primary external URIs, 'https://traffking.ru/strik?utm_term=aamc+msar+school+search', is flagged as suspicious. The presence of urgency language in the document body further supports a phishing or scamming intent. ClamAV detection as 'Pdf.Phishing.Trojan' reinforces the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://traffking.ru/strik?utm_term=aamc+msar+school+search PDF link annotation
    • https://cdn.sqhk.co/gutemokerezo/gfY0ici/horse_racing_manager_online.pdfIn PDF document text
    • https://zasuzepomuban.weebly.com/uploads/1/3/4/6/134627511/b8269fed3f4.pdfIn PDF document text
    • https://cdn.sqhk.co/rufigukuj/R4ZPCNO/wexivovuwavipefa.pdfIn PDF document text
    • https://nizifaweneli.weebly.com/uploads/1/3/4/5/134589853/zisoxivizano.pdfIn PDF document text
    • https://sagoxanoku.weebly.com/uploads/1/3/4/3/134350044/pefoperef.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/zibenoroduzuw/96242815544.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/kinh_kinh_mung_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78b7764d-6263-438b-bf6b-6dbf13696df4/je_suis_une_pizza_paroles_charlotte_diamond.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/66632955234.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/xidapexuwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8254d2b-df5d-444a-8caf-41beb7480714/download_dont_be_a_menace_to_south.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/aladdin_game_for_android_apk.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_off0000e248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE248 5028 bytes
SHA-256: 98dcc8f346ca2a7a47ae993ae42ed642d4fd73d6575f26f4a0ad01b0d024badf
font_01_sfnt_off0000f335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF335 11320 bytes
SHA-256: 4a5e04a568becfa41ff70793dec0a4f040e4db471548bb33863c90a6b6273dab

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