Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf6a094d3a2549b1…

MALICIOUS

PDF

68.1 KB Created: 2020-11-20 07:46:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 462fc27a426e5eb5644b35b6e7f5889f SHA-1: 7a257eaa0ef90023852cc816842dd80fed6da04f SHA-256: bf6a094d3a2549b1a6ed61c345af72873a26b25278962ab4ffa9ce85b618eb62
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to manipulate search engine results. The primary URL, 'https://trafficel.ru/aws?utm_term=samsung+soundbar+m450+manual', suggests a lure related to product manuals. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://trafficel.ru/aws?utm_term=samsung+soundbar+m450+manual PDF link annotation
    • https://bezebaterizijir.weebly.com/uploads/1/3/1/3/131384714/funezesimosadigo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372707/normal_5fa0bb7bd2a5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391899/normal_5fa37b82301ee.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/07c1b8a3-bdb6-4488-b2fc-094bf584b856/bavigumapoxefizaji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5ab65f1-709a-4b53-b6a5-3483887435e9/dikejo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/968d5163-3092-4905-afe6-703df3e6ee80/35074767145.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/70474161363.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fe9870a-927d-471c-b9f7-4bdbc4fb0638/3302028940.pdfIn PDF document text
    • https://s3.amazonaws.com/texifaxepag/what_type_of_file_does_garageband_use.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf64c86e-0d59-4db2-9426-6c256c16d7b7/49495948367.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4bb3af7-d502-4461-ab1b-5906581f4693/ignorance_and_want_a_christmas_carol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49c73ee0-05cc-43b7-8820-0aae70fef77a/all_guitar_chords_tab.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_off0000c88a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC88A 5740 bytes
SHA-256: 641709153ca255be16633de97d374f697fd9ba24957602db2d10b33ce7df306a
font_01_sfnt_off0000dc01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC01 12288 bytes
SHA-256: c3e30f493d165fe83fdeffa73ddb667b4c4085b133df7247882160c2d61532b9

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