Malicious PDF — malware analysis report

Static analysis result for SHA-256 19e1d6fd1247a217…

MALICIOUS

PDF

81.9 KB Created: 2020-11-11 15:08:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 3ccea1e7ba76b12ae3160ee74e8bbecf SHA-1: bc47b6f6e1912f6c7533d42bcb60d4ceef56e2d2 SHA-256: 19e1d6fd1247a2170f5d6ab80934e7c3ba4d01f43b6b0a10a84f45cc3f4d98d4
214 Risk Score

Malware Insights

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

This PDF file contains numerous links to external websites, with at least one identified as a malicious redirector. The presence of a link farm and the ClamAV detection indicate a malicious intent, likely to redirect users to phishing sites or download further malware. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://traffking.ru/aws?utm_term=duck+life+4+game+pc In PDF document text
    • https://rusezoxebob.weebly.com/uploads/1/3/4/3/134355184/vuxupibofosivag-filofogagi.pdfIn PDF document text
    • https://nogafuku.weebly.com/uploads/1/3/2/8/132815296/5740840.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/bulozor/how_to_draw_a_keychain.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41861617-45fc-4cc2-b41c-54225de0a024/siberian_huskies_for_sale_in_georgia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/351964e5-efdb-4d3b-821d-6481a0374965/vepitaleworifesabi.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/dilofawujimux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/138c0796-1c4e-449f-b28b-13bd460bd624/learn_to_fly_2_mobile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed79bc57-3fbf-48f3-b428-fea0ea122a22/vokeluzupewosidepoferu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8544a13d-9f1b-4bae-98ae-8dd5145d02d3/95261785119.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_off00010507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10507 5212 bytes
SHA-256: 69cc39b61dd885c00cb63c4a535d71687065512c3d0989cfab967e1199b46b4a
font_01_sfnt_off000116d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116D1 10608 bytes
SHA-256: a8c46a5e2cb77de1c089c947755e97cbace8551b81fc2e1378913710de5071d3

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