Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bd5ba6208081632…

MALICIOUS

PDF

78.3 KB Created: 2021-03-31 13:21:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 101dce35754a472e9d755fbcb99e21b9 SHA-1: 1645a6acb5056d83a5bbc8fdd8699eb8684bacaf SHA-256: 7bd5ba62080816323a7e03cde13ab04445b1756ed58c49394b3b303623ffe8db
186 Risk Score

Malware Insights

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

This PDF document, identified as malicious by ClamAV and an ML classifier, functions as a link farm. It contains numerous external links, including one to 'botokaw.ru', likely intended to redirect users to phishing or scam content. The document's structure and the presence of many links on disposable hosting suggest an attempt to generate traffic or distribute malicious content through deceptive means.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/wix?keyword=true+colors+test+results PDF link annotation
    • https://zizusufake.weebly.com/uploads/1/3/4/6/134646877/727c91b6.pdfIn PDF document text
    • https://bikugepoxo.weebly.com/uploads/1/3/5/3/135351236/repaj-gewanirul-faxagif.pdfIn PDF document text
    • https://rebavunegiluzu.weebly.com/uploads/1/3/4/4/134497465/63cd6cf0053013.pdfIn PDF document text
    • https://kerejokav.weebly.com/uploads/1/3/1/6/131637695/4898106.pdfIn PDF document text
    • http://waxenotesanil.22web.org/netipewetibemamevow.pdfIn PDF document text
    • https://tedozumezefa.weebly.com/uploads/1/3/2/7/132740670/witozakirafamusu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409798/normal_5fc714f7076b8.pdfIn PDF document text
    • http://dikuziropuviv.22web.org/74050254375.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419192/normal_5fd62ae4d4d5e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://laletanegimiw.epizy.com/speed_velocity_and_acceleration_problems_worksheet.pdfIn PDF document text
    • http://dizogusuvi.rf.gd/34823672738.pdfIn PDF document text
    • https://s3.amazonaws.com/pokixovuxik/nimetepixozona.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c96932b3-436e-4690-b192-e344f4f19b8d/how_to_make_a_garden_seat_out_of_pallets.pdfIn PDF document text
    • http://musovinudebepak.epizy.com/crazytalk_animator_3_pro_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2155f7b-d173-4412-824a-c13cec40263a/luliwefukonanixi.pdfIn PDF document text
    • http://vemireme.epizy.com/meloganopulowuzi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b28a287-f7e8-4d19-b43f-a7a9331578ed/87905660295.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09c151b6-02c9-481d-be81-c87864d41d97/black_and_decker_leaf_hog_240_mph_blower_vac.pdfIn PDF document text
    • http://boxogegifenefi.epizy.com/ximupelumuz.pdfIn PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/how_to_replace_drive_belt_on_ariens_lawn_mower.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc16da40-ebff-4ec7-9170-661441c7189d/ap_human_geography_notes_chapter_1.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_off0000f64c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64C 4532 bytes
SHA-256: 52b67f1558d246dc6fec3b99979ba0d7ad2826a0b05caa8caf86894a8a6a14eb
font_01_sfnt_off000105c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C5 11412 bytes
SHA-256: 1d1b8a18ba785910d8213a72140e711857b3de953efc6e25a2512d10f5544600