Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1b90e1be7121023…

MALICIOUS

PDF

69.9 KB Created: 2021-01-08 18:06:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: f39e1df88b75c2a9a0209de2d2babaf7 SHA-1: d8a4ce51f74a2e416655050cc5c55b06943aa47d SHA-256: a1b90e1be71210236db09e5e01ab12fb25edf04aa81ce09d2ce87ded87e9fc39
214 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, and is detected by ClamAV as a phishing trojan. It contains a large number of embedded URLs, many of which point to redirector infrastructure or link farms, suggesting a phishing or SEO poisoning campaign. The document body, though partially corrupted, indicates a lure related to 'Wow Classic' farming guides.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://ggtraff.ru/aws?utm_term=wow+classic+devilsaur+farming+guide In PDF document text
    • https://gabijuwi.weebly.com/uploads/1/3/1/8/131871583/4d322373337c2.pdfIn PDF document text
    • https://kutufexefe.weebly.com/uploads/1/3/4/6/134695169/tixepurev-pefetunu-mazufug-buxolumijipu.pdfIn PDF document text
    • https://wugemevafiditi.weebly.com/uploads/1/3/4/3/134382928/1801678.pdfIn PDF document text
    • https://cdn.sqhk.co/litalile/hahahja/dragon_village_cheat_android.pdfIn PDF document text
    • https://cdn.sqhk.co/lisesemafo/sjbgiih/xarenisuvipujaju.pdfIn PDF document text
    • https://cdn.sqhk.co/tedogegez/ihFTSjh/give_way_traffic_sign_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/rubekafux/ijtXjef/betigavowo.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/pokixovuxik/37958402327.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/46774195839.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/58616808154.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/89117601721.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/16129371075.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_off0000d396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD396 5504 bytes
SHA-256: 6919b970d28a8b28921174b14a7eaa4f5dbab383b1f093f02ccbb648cdc41193
font_01_sfnt_off0000e658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE658 10808 bytes
SHA-256: 53614d809a2ff01a29ad90222975dde12cad482dbe4eeccee6a4b6f2e2c7713b

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