Malicious PDF — malware analysis report

Static analysis result for SHA-256 7077c4b569ee2815…

MALICIOUS

PDF

74.6 KB Created: 2021-03-28 04:22:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 04558984f2810d2247a82de30fce3c33 SHA-1: ae200b3a234f9f607f20e52c6356e7c94ef10d71 SHA-256: 7077c4b569ee28156b06b5e24ff05b894527fb0bed7350b4cb1f4a476a1b3b33
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URIs that likely lead to phishing sites or malware downloads. The presence of multiple external links, including one with a 'utm_term' parameter suggesting tracking, points towards a campaign to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xajibur.ru/123?utm_term=action+new+movies+2018+bollywood PDF link annotation
    • http://bella24.xyz/weight_watchers_eating_plan62izg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455881/normal_60497c691c912.pdfIn PDF document text
    • http://temppicture.xyz/nilabopisscewm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404310/normal_60338a123499a.pdfIn PDF document text
    • http://lnstgramhelpcopyright.com/gauntlet_dark_legacy_runestones_locationsq5nls.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369524/normal_5fdab1f99df22.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/10162c2d-a3cb-4c7a-8ec8-0340264b6261/25617034785.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d9e88c4-b23f-465c-b32f-a1a256386e43/ladiji.pdfIn PDF document text
    • https://f815f12b-539f-4060-8ed9-abd2caada31b.filesusr.com/ugd/ceb2e8_38f071cd89054c6cb867bbe43064dfc5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f338b12-cdbc-4ee4-83dc-bf83fc635a3a/pifivasamafemolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0feab80b-2cba-475a-a059-dc49edaf7e8b/jopuzimubitutikononaxo.pdfIn PDF document text
    • http://bavizajo.epizy.com/zesopamedepemo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a425c49c-e4c9-4600-9b5c-8621d19f3211/what_is_the_pixel_size_of_my_monitor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c07fcce7-a6cc-47cc-a2e1-ff937e05893d/liwujejizupaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fa8c5a5-6731-440e-8a23-f44a8dedc5a4/90868486777.pdfIn PDF document text
    • http://girupesoja.rf.gd/bukosuz.pdfIn PDF document text
    • https://689a2394-1721-4ce0-b6f7-af9f1dc0d621.filesusr.com/ugd/0f5b72_1d04cf8654c44534b8a7887055588039.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d70cb69d-afd5-4b1f-9af0-7c2479cb5d20/dymo_letratag_tape_jam_problems.pdfIn PDF document text
    • http://tojepulevuzowu.rf.gd/peavey_classic_50_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62124a9b-bb45-4c30-97c0-0a8c9591dbad/62727905875.pdfIn PDF document text
    • https://8d94caac-80d5-4f6d-a73a-04ed47837dc1.filesusr.com/ugd/585b1d_91fb0c805bd24f41897261edd3ee3408.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/80595948-23f8-4f5b-a75d-8ef9785f7c3f/aprendizajes_clave_segundo_grado.pdfIn PDF document text
    • https://34ec465e-51aa-4dba-9a8c-c05fcfb5ae84.filesusr.com/ugd/df15ee_60aeb7246e79426d9d9f604239598bca.pdf?index=trueIn 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_off0000e5fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FE 5680 bytes
SHA-256: ed218e7236082e4bb55f00183f9ab0722476470de8066b09bea5a9f1cbeea448
font_01_sfnt_off0000f969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF969 10400 bytes
SHA-256: b8f3093e76d42111a9eb5651468773fcde5bce3803cfd2a701ac6688cadcd1ef