Malicious PDF — malware analysis report

Static analysis result for SHA-256 63abcf602de7dc3d…

MALICIOUS

PDF

78.7 KB Created: 2021-03-09 15:21:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0995674bd28e3851bd48735ed7d8f59c SHA-1: 9bd538aa17274dce3b53fd04f33e5f16cef17be4 SHA-256: 63abcf602de7dc3d195a9e087f15239a459b573f07fd53865409fa05398c922b
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. The document body, though heavily obfuscated, suggests a lure related to 'effects of youth unemployment in kenya pdf', likely intended to trick users into visiting the external URL for further compromise. No scripts were extracted, but the presence of multiple external links and the high ML score indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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://kuzutuzo.ru/award?keyword=effects+of+youth+unemployment+in+kenya+pdf PDF link annotation
    • https://cdn.sqhk.co/bipaneri/bgdQXji/xeburorazoxowidixib.pdfIn PDF document text
    • https://rupanusevufow.weebly.com/uploads/1/3/1/3/131380126/495002.pdfIn PDF document text
    • https://cdn.sqhk.co/losokifape/gghezgg/39677967539.pdfIn PDF document text
    • https://cdn.sqhk.co/gojinuma/ggyheji/dwts_judges_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/jesovolavig/jYiahcX/98300076366.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468534/normal_5fded60cca947.pdfIn PDF document text
    • https://rogixatig.weebly.com/uploads/1/3/5/3/135323026/8410141.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450440/normal_60197c8005115.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491414/normal_6032b71611090.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495525/normal_603ca8e26ac74.pdfIn PDF document text
    • https://cdn.sqhk.co/taxodisilif/e8Fhghf/amazon_a-_z_guarantee_refund_claim.pdfIn PDF document text
    • https://topukutenikoxi.weebly.com/uploads/1/3/4/6/134668920/dorejojifan-lobisa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://98771922-91e4-4673-aa0d-7794f4435593.filesusr.com/ugd/b6aaa0_31a8eaacfd0649c3aa35cd895f03d63a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d43740c-fe67-4746-a8ef-97d2918855d1/bazojadobefuxidixowoza.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/new_psoriasis_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/2590785149.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ff8f60e-c7c9-49be-9d7f-df05a3704eca/raximaja.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/subletting_lease_agreement_template_south_africa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82b782c2-b723-48bf-a9c3-45cb9e92793e/78785994453.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/the_kiss_of_deception_series_order.pdfIn PDF document text
    • https://86b7bb9a-6a0b-496c-a062-e8aa60c365d0.filesusr.com/ugd/dcf311_aa5e00682b524ea6a440361b269ac549.pdf?index=trueIn PDF document text
    • https://30f21d72-2b41-4965-a7bc-2abb02bf1ded.filesusr.com/ugd/47e66e_f61ad9561a3f482ba0bb55a877337b3e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/xowokebavujupaxuva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46f6b589-d7a9-4ea4-bb95-d95f405a70c9/64396133031.pdfIn PDF document text
    • https://4adff18d-dc39-4349-be2c-eeb12737f1cb.filesusr.com/ugd/9117e0_993a03df439144bfa4fda5f0b75383ff.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_off0000f827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF827 5420 bytes
SHA-256: 846ef36c94fbccfdfe1d933bf1d60efdb8b3f449c533f2025e7a59ae45084432
font_01_sfnt_off00010a86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A86 10032 bytes
SHA-256: 8cb40b249e4761ec87b1618e58d0f6c06ed5b37686ba3e5181df78f9671925ad