Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c0e3785162803df…

MALICIOUS

PDF

73.0 KB Created: 2021-01-16 21:39:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7f2d1ab8a6cd0a9db9368d3b9dbf5e93 SHA-1: 7936266e4c267b47a67ddffba22cff9f72bdf921 SHA-256: 1c0e3785162803df1879913635a594609720d0b83e0845dfd31325f96fad05e9
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure and a PDF link farm. The embedded URLs suggest an attempt to direct users to potentially harmful content. The ML classifier and ClamAV detection further support its malicious nature.

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
  • 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/123?utm_term=introduction+to+clinical+pharmacology+8th+edition+pdf In PDF document text
    • https://gugewixurot.weebly.com/uploads/1/3/4/3/134393699/772878.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480145/normal_5fc1a94db3b0b.pdfIn PDF document text
    • https://site-1177476.mozfiles.com/files/1177476/halloween_carving_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380076/normal_5fbb34bc7bd4c.pdfIn PDF document text
    • https://bawigadumifop.weebly.com/uploads/1/3/4/4/134494387/gesanubofonabakak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372104/normal_5f9cbb2a2795c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414514/normal_5fe640424253f.pdfIn PDF document text
    • https://cdn.sqhk.co/puwukuwos/5gfWjh9/sopiwulijuvurirosoju.pdfIn PDF document text
    • https://site-1171689.mozfiles.com/files/1171689/wufatuwu.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/foneniz/dark_agenda_book.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/lagu_ambyar_versi_koplo.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_off0000dfc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC6 5624 bytes
SHA-256: e94e0c848b9a6612d6342b5f8df7619e6d206af204982fbd4299be41f7fc57ba
font_01_sfnt_off0000f2c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C4 10656 bytes
SHA-256: 4324452adf64804ca47687f9bad026068de652ba78c893b4f0d5dd0dc59f5a4c

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