Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ba1892d1bd51fbd…

MALICIOUS

PDF

73.2 KB Created: 2020-12-06 05:52:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ccb296f5021e321dbc6d0f0c43c765d7 SHA-1: 3e5c5af7c99d7ac5862ba7ba8de723351fc5951a SHA-256: 8ba1892d1bd51fbd61613c3c5b488fb506cfe982e8b2de78ab9b4e8dd8d167d1
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. It contains numerous external links, including one to 'trafffe.ru', suggesting a link farm or phishing attempt. The document body, though partially corrupted, mentions 'Quickbooks for mac 2019 tutorial', indicating a lure to trick users into downloading further malicious content.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://trafffe.ru/123?utm_term=quickbooks+for+mac+2019+tutorial PDF link annotation
    • https://gemaxudemaxepeb.weebly.com/uploads/1/3/1/0/131070646/jopuvimilena.pdfIn PDF document text
    • https://vomalokigalexa.weebly.com/uploads/1/3/4/3/134329787/ea62a536f.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/7922058.pdfIn PDF document text
    • https://fekudumubaf.weebly.com/uploads/1/3/2/6/132681201/parajunisatejo.pdfIn PDF document text
    • https://varodapomibaga.weebly.com/uploads/1/3/4/8/134874415/suforigelab.pdfIn PDF document text
    • https://pimetagedipimop.weebly.com/uploads/1/3/1/6/131636886/a21786ea4c.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/wiwuxot/71485467566.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/temp_a_dot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa29a0d3-5b7d-4e50-b8bd-29687b7b18f0/qualcomm_atheros_ar8161_driver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7a9832c-624d-4352-97cd-d6fd39358c55/362416937.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e60b24b06a7eb3ff207b/t/5fc332433c02f22b9d7533ca/1606627908611/lexus_club_box_rangers.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/22958654592.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dc532e34347c7043ce2c/t/5fca062aec1d586fb392717f/1607075370497/off_road_subaru_forester_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/pufikobazediseto.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_off0000e0ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CA 5772 bytes
SHA-256: 3e29b599b99cffbff4330f96fb4d23fbf12a3ca502992013ea163d4b2695ed5c
font_01_sfnt_off0000f462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF462 10360 bytes
SHA-256: 77d7842b68d61bf3b0605bdaf09446d78a6a221ca652a300124d3816b98bb5aa

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