Malicious PDF — malware analysis report

Static analysis result for SHA-256 082ab60274bed052…

MALICIOUS

PDF

82.3 KB Created: 2021-05-25 02:06:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a81e4b9c93ef6bdb389542157e00828d SHA-1: 575e6ce8e702b8d56c366963494add761d0b0f59 SHA-256: 082ab60274bed0521a14a0ca2a5816c1bbc498e789070ccad472b20e0420ac3a
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://lozipotod.ru/strik?utm_term=how+to+get+answers+to+newsela+articles PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4383929/normal_5fc56d7a85a5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407576/normal_604b92d238b0d.pdfIn PDF document text
    • https://ludakugoru.weebly.com/uploads/1/3/4/6/134698973/kosejokuxefud.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447096/normal_6000d9db18c87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477629/normal_606e806469014.pdfIn PDF document text
    • https://bivapere.weebly.com/uploads/1/3/4/6/134689139/9c342ce76b57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469837/normal_6020f918a67ac.pdfIn PDF document text
    • https://remogomati.weebly.com/uploads/1/3/4/7/134748537/28fba30.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368752/normal_5fefcc4522103.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490367/normal_603eda9eb7298.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411489/normal_5fce46004fdb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424376/normal_60485c5668490.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475737/normal_6054c6fabd7f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490534/normal_604a1106d9331.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366003/normal_605faac77b08a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391920/normal_5feb3a4ed787c.pdfIn PDF document text
    • https://fofirajajamide.weebly.com/uploads/1/3/4/6/134643930/1668878.pdfIn PDF document text
    • https://navigawagin.weebly.com/uploads/1/3/4/6/134653302/dogapenonude-dozegitofujifot-rojorazagemiju-divape.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378834/normal_5feb7e9105461.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479678/normal_60647b9705c0d.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://uploads.strikinglycdn.com/files/037fe58d-3fda-4ced-8546-fc6e26ff3d86/how_to_live_by_yourself_after_divorce.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd0f7ffa-22a8-4e82-8a13-1d59c49bef01/lugiwefifusugij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2330d9ed-59e6-4b6c-b531-06ef61fdea2f/29554897130.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/machine_learning_algorithms_for_sales_prediction.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4ef3225-705b-4e55-a34e-d0a25d13f272/xikejoxudagofaxusoviwage.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/how_to_write_a_college_admissions_essay_examples.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_off0000f73a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF73A 4808 bytes
SHA-256: 5d0bce4cf341722eb4d8b6d04cd4a5a45914deaf9aa6d2f9183076e268e912ac
font_01_sfnt_off000107a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A9 10984 bytes
SHA-256: 60059b7a64d0a9c11fc0efd2d5d01a3983e48df48fa1d0052d2f61f32d951da9
font_02_sfnt_off00012ce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE6 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176