Malicious PDF — malware analysis report

Static analysis result for SHA-256 17dff5d3e253c890…

MALICIOUS

PDF

73.9 KB Created: 2021-01-16 22:53:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 8d21da9b6aa3e4a86a36b12933679e50 SHA-1: 249a6b942870acd6df254522969ed3f21dc927bf SHA-256: 17dff5d3e253c890e47fa535c13a0c563a1511ce5bab7fb5c8c49f01c3f6dbbf
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many of which are to unknown or potentially malicious domains, suggesting a link farm or phishing campaign. The document body, though heavily obfuscated, appears to be a lure related to an 'Outland engineering guide'. No scripts were extracted, but the presence of numerous external links points towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://traffset.ru/123?utm_term=outland+engineering+guide PDF link annotation
    • https://site-1172011.mozfiles.com/files/1172011/invitation_to_retirement_party_template.pdfIn PDF document text
    • https://site-1175681.mozfiles.com/files/1175681/cheats_para_ark_survival_evolved_pc.pdfIn PDF document text
    • https://damijuvik.weebly.com/uploads/1/3/1/3/131381376/fuxurepuneso_degufub_gerakujuvox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381541/normal_5fec722dccd0c.pdfIn PDF document text
    • https://womomoko.weebly.com/uploads/1/3/4/8/134848640/0337aa134bf38c.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/xukirizugukugi/capitulo_2a_realidades_2_crossword_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/bee_swarm_codes_that_give_you_eggs_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/bstc_syllabus_2020_download.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/66742123422.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/video_er_opera_addon.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_off0000e57f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE57F 4840 bytes
SHA-256: 4022dea8591df2690a4cccdffc5259c746d503ce4dc08d5c06ac14276fe75c90
font_01_sfnt_off0000f600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF600 10904 bytes
SHA-256: c69e54745d150738a01a886274271cc1d7b3e6a3e5396fbea443b80a19c691de

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