Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c192cfc6023be80…

MALICIOUS

PDF

68.6 KB Created: 2020-11-17 00:05:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 40134bc69f4ffc9d93dd46ae740079a5 SHA-1: 755326ce10c307ea595d87ccf8f73de6ce52a4fd SHA-256: 7c192cfc6023be80ee5d50cd6f22d1a943557edc5321da4e88b74a34165ce70f
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one pointing to a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to a pet's behavior, likely to disguise the malicious links.

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
  • 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://traffmen.ru/strik?utm_term=dog+keeps+licking+leg In PDF document text
    • https://gasilarax.weebly.com/uploads/1/3/4/5/134595303/aa0cf72cc22.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wupixufekijax/zewogonolalegid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9721d649-a350-459f-a4de-4c281502fba6/game_of_thrones_s08e04_web.h264-meme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09576cdf-4e55-47af-b409-c1a3bdb9336f/propiedades_de_la_materia_cualitativ.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/vifeduvopapigezopulowe.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/epidemic_music_pricing.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/teatv_ios_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/automobile_engineering_subjects.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5e614cf-746c-4558-8a17-7ff0a0365e23/43078934865.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/physics_textbook_class_11_cbse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6abc543b-4105-4b50-842b-3fbbc6bd1671/lutusugakizuloxoxebezis.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/bepiriramo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16db2452-804f-4a3d-91a1-5ebd69d3a0da/37734191030.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4FD 4564 bytes
SHA-256: d1134ea21d541099723b59f8157c301ef9763eaa47d950ed4611239268134aa6
font_01_sfnt_off0000d491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD491 10264 bytes
SHA-256: 1523366f2d06dcd81ce961c8be3e6edd2b26ffa52434680522140013def6a77b
font_02_sfnt_off0000f7a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A0 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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