Malicious PDF — malware analysis report

Static analysis result for SHA-256 854f0054ef907895…

MALICIOUS

PDF

68.0 KB Created: 2020-12-17 15:19:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 3586ab96a5d8816ab4d59d05e884f55a SHA-1: edf39a45883e2ce3d1b7847228401eacecdfa0d1 SHA-256: 854f0054ef907895706de47d5adf963e6bb918a9ccc64a582eef4c9de386ddf4
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical detection for a link farm and a high ML score. It contains a large number of external links, with one pointing to 'trafftec.ru'. The presence of a link farm suggests an attempt to manipulate search engine results or direct users to potentially malicious sites. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

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://trafftec.ru/123?utm_term=mini+trash+can+-+dollar+tree PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489407/normal_5fa9050bacfbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463552/normal_5fd7b5937fc9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413225/normal_5fd6a2025da4d.pdfIn PDF document text
    • https://biduvokiket.weebly.com/uploads/1/3/4/3/134367510/romatizulovus.pdfIn PDF document text
    • https://jotitotibewava.weebly.com/uploads/1/3/1/3/131383271/406cb00ee6a7e6.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/354abe04-c0d0-41e3-9e4d-fd8e7cfbc5fe/fomuxiwagowemud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7aec15d-470e-4b5f-8487-319380ea5741/animal_jam_hack_no_surveys.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e6cc350-a51d-4823-86be-dd53b5e57f08/136914737.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be2d4aa7-909d-4bfe-88dd-a2385ad23a5d/92575005195.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/945abbdb-1ea5-44f7-8c4a-129bed7e132a/dorovufejununomutozujugox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7df5a4bf-4945-4151-8f4f-8056ceac7069/36636040971.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dab1d400-cd7d-432b-93e9-d6690cbfbcfb/does_grape_juice_make_you_poop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79b16dcc-3869-4f5d-8d2b-fd4275e2f6be/lewis_and_clark_movie_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/150346c5-9149-447e-b08c-46f3e84a075f/95344578915.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_off0000cf32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF32 5064 bytes
SHA-256: 1a7d5a3cf834e514dd48808eb5abad4e52cae79152269c87fa29eae21623122c
font_01_sfnt_off0000e06e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06E 10292 bytes
SHA-256: 882c1a12a7220bc34e8e21dc12b2e316e7510d5818778f1957da4c4f0693a0c1

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