Malicious PDF — malware analysis report

Static analysis result for SHA-256 c82bf2986984822a…

MALICIOUS

PDF

76.2 KB Created: 2021-03-09 09:28:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c83d13fa50f3b0288910d5be53568275 SHA-1: 4c39b17ae6e756c703d5f4e7c2ea06f060ce3e0b SHA-256: c82bf2986984822aee5faf273dd89d0913a89bd73e5c70155dfdc39223c239e8
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or malicious content delivery attempt. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation designed to direct users to potentially harmful websites. The document body, though heavily obfuscated, appears to be a lure related to search queries.

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://xezojetit.ru/wix?keyword=what+does+wya+means+in+texting PDF link annotation
    • https://woxatawupipop.weebly.com/uploads/1/3/4/0/134016674/f63fb89.pdfIn PDF document text
    • https://gupapuna.weebly.com/uploads/1/3/4/7/134726568/2884329.pdfIn PDF document text
    • https://zaxewunatomilar.weebly.com/uploads/1/3/4/1/134131499/xavuv.pdfIn PDF document text
    • https://pixipemojawipe.weebly.com/uploads/1/3/4/4/134459682/didoxaxip-mukafifezemobem-kadurezu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://69cf8a46-0d3d-4b71-8fd1-93df925da18e.filesusr.com/ugd/e4064d_a46b918dd37b4465ab9dabe616aed7d7.pdf?index=trueIn PDF document text
    • https://493f174a-a540-412c-bacb-e5b7b26cbfcf.filesusr.com/ugd/95bb70_208dfaa901364becae6df5f9f2b05561.pdf?index=trueIn PDF document text
    • https://580b68e3-2104-4118-ae5b-4f285de1c062.filesusr.com/ugd/dad7b5_3fb7f34f5ff04438995f651fd8321c3c.pdf?index=trueIn PDF document text
    • https://8909b315-4d59-4940-aabf-0fdaa532e0ad.filesusr.com/ugd/4542d9_74ed3e9e76f745e58410cb42efd564e6.pdf?index=trueIn PDF document text
    • https://35057dd6-1d18-4acd-96c9-af3b7fddc7cd.filesusr.com/ugd/978dd5_abde1bf764fb4b998cc76ff010947303.pdf?index=trueIn PDF document text
    • http://kalotiwinilobiw.epizy.com/foreclosure_on_timeshare_credit_report.pdfIn PDF document text
    • https://da18e6a8-d720-42de-a88c-3f13daad7efb.filesusr.com/ugd/08fe48_366dea53842f47f9821bcbf5b7e08600.pdf?index=trueIn PDF document text
    • https://eadb47d6-6712-4ecd-aa5a-2cdcf2d90b86.filesusr.com/ugd/c844bf_6d0a4e4d5d7d4adfbc01553ba06aaa73.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcb10513-112b-43b5-946b-417c790d3a5c/how_much_do_preschool_teachers_make_in_colorado.pdfIn PDF document text
    • https://08b4a39d-fa16-4eaa-91be-ae90003cacb9.filesusr.com/ugd/237bf7_d96450455ce24240b2d11c547b0224cd.pdf?index=trueIn PDF document text
    • https://1cf095b7-1d29-4152-b82c-7733cf7ba0c7.filesusr.com/ugd/c1de29_7679029359ad407298b0bd99d6d74df7.pdf?index=trueIn PDF document text
    • http://zalinejogimi.rf.gd/3rd_law_of_thermodynamics.pdfIn PDF document text
    • http://jizizubusede.epizy.com/dirt_bike_gear_shops_near_me.pdfIn PDF document text
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_351ff0ebae7d46dd8acfb4e9ed7115e0.pdf?index=trueIn PDF document text
    • http://janevowox.epizy.com/22475401187.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31e7b10e-802b-4718-b954-1cc5a85ab8d1/properties_of_integer_exponents_independent_practice_worksheet.pdfIn PDF document text
    • https://36071b1a-d853-4ad1-bccf-0ed894d94038.filesusr.com/ugd/906e9f_eddc354862ba4ec88b7baac3246af755.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef287209-34ab-4178-960a-e56db731766a/pretty_little_liars_cast_then_and_now_2019.pdfIn PDF document text
    • https://9fb0fece-6c2a-4f8b-8ff1-5d9ea67f5ee7.filesusr.com/ugd/f6a907_f74152712a16494aa11cb2f83a66abb7.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_off0000ee09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE09 5384 bytes
SHA-256: c6d069095e9b2ee4ba66bbc64fc88b449b07e74f33137cd564c9ddc469c4b14d
font_01_sfnt_off0001005a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005A 10360 bytes
SHA-256: da7fb87a2b9b4b9a008408aa491a9579e97380dc5d1cd987f97af9b12d8857da

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