Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae1b4cd0cfe6cd03…

MALICIOUS

PDF

66.8 KB Created: 2021-03-01 11:12:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b31ceb053a37caf4aa22ea3cdc5d3758 SHA-1: a9e580f5c20bc251b5950c3189c7a126acc1570b SHA-256: ae1b4cd0cfe6cd036b3a0d77f3cb2e1cd01088ce330750c70bd2b7539f063553
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by both ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of a large number of external links, including a 'link farm' heuristic, suggests the document is designed to redirect users to potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a phishing or SEO manipulation attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xajibur.ru/award?keyword=diary+of+a+dope+fiend+marilyn+manson+lyrics PDF link annotation
    • https://gimituwemowi.weebly.com/uploads/1/3/4/8/134872285/kovatafuri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471481/normal_600d4babc57b8.pdfIn PDF document text
    • http://shmelev.pro/vedic_astrology_sign_datesh0tnt.pdfIn PDF document text
    • https://fosobezi.weebly.com/uploads/1/3/4/8/134898374/6111436.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370053/normal_60267820beab5.pdfIn PDF document text
    • https://rurevudo.weebly.com/uploads/1/3/4/2/134265418/8203462.pdfIn PDF document text
    • https://rudoliretumuw.weebly.com/uploads/1/3/4/8/134861944/bulewefusitaguwe.pdfIn PDF document text
    • https://muluxadi.weebly.com/uploads/1/3/1/4/131453645/mefeganilazogo.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/jarirotexab/vuwoleluvatuxurigapot.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/android_mobile_hacking_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/how_to_cut_stone_tiles_with_hand_tools.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/60088974738.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/83379047250.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/electrical_abbreviations_dictionary.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_off0000c8ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8FF 5404 bytes
SHA-256: 69b5c57a0930a73f6ca7303d9f45c703cdc63367faf239cfa6fc0d651a0fb80b
font_01_sfnt_off0000db5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB5B 10060 bytes
SHA-256: 34cbd3ce9599f5aee3b3c2a594e64c359c968ba9c66832ce191413c6b2fe04a5

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