Malicious PDF — malware analysis report

Static analysis result for SHA-256 e84508b414c518a0…

MALICIOUS

PDF

79.3 KB Created: 2021-03-23 21:17:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99d88cb95908be6fbf359280e2137a5d SHA-1: 115eff261cc269411d69758b5af0f908cd74ff0b SHA-256: e84508b414c518a0c53ef963d65b3c350f41e3c651b716655d0f3e4c8e1b2e69
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, with the primary URL pointing to a suspicious domain. This suggests the document is designed to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/wix?keyword=tommy+timmy+laser+reviews
    • https://mefixakiderix.weebly.com/uploads/1/3/4/3/134319494/7687697.pdf
    • https://kixuvatapowow.weebly.com/uploads/1/3/1/3/131383305/duletofibiga_vizuta.pdf
    • https://sudewivozuv.weebly.com/uploads/1/3/2/3/132303071/vuraju.pdf
    • http://todolosepaxo.iblogger.org/bangla_kobita_image.pdf
    • https://tupipano.weebly.com/uploads/1/3/4/5/134598946/5515448.pdf
    • https://pulezigo.weebly.com/uploads/1/3/4/6/134600697/natin.pdf
    • https://nepokotivo.weebly.com/uploads/1/3/2/8/132814168/894558.pdf
    • https://rojuligu.weebly.com/uploads/1/3/0/9/130969709/2b668a7.pdf
    • https://gawofatofuwe.weebly.com/uploads/1/3/1/3/131380275/375417.pdf
    • https://pixipemojawipe.weebly.com/uploads/1/3/4/4/134459682/piwupilade.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://mexawuzemogo.epizy.com/how_to_train_for_forklift.pdf
    • https://s3.amazonaws.com/kaxukok/69472018067.pdf
    • http://zotomogizolelaz.rf.gd/16201043184.pdf
    • https://1423d76f-a56f-4481-bf87-726e17039346.filesusr.com/ugd/14aee2_7e3ebc79da9942ae98beae86cb63227d.pdf?index=true
    • https://s3.amazonaws.com/xepululejiwof/chronicle_of_a_death_foretold_gender_roles_essay.pdf
    • https://s3.amazonaws.com/ninasivol/new_york_state_dmv_police_reports.pdf
    • http://musepojomu.rf.gd/33295136704.pdf
    • https://30383b9b-b26a-44f4-9a26-03873af8f03c.filesusr.com/ugd/fdee49_a277dfcaf37245eb8dad4f1f2d097238.pdf?index=true
    • http://pafisewu.rf.gd/aldehydes_ketones_and_carboxylic_acids_ncert_solutions.pdf
    • http://kafozubasopuji.rf.gd/articles_partitifs_exercices.pdf
    • http://jopiliseduvorop.rf.gd/1996_ford_ranger_lug_pattern.pdf
    • https://s3.amazonaws.com/muvemasoxaji/antenna_magus_full_free.pdf
    • http://betefaxepuj.rf.gd/financial_shenanigans_3rd_edition_download.pdf
    • http://gubowejuxenixu.rf.gd/modet.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee90.bin
d5a717b2d5c494a94a00be0e5230c9cb9d0221f6d372e26b60fd98595f7da3ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE90 4716 bytes
font_01_sfnt_off0000fea3.bin
8df188a2256fe8cb54747de49a8479e5d5ce02dba2e0c7389399d6dd8b71fd80		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA3 10068 bytes
font_02_sfnt_off00012105.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12105 4324 bytes

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