Malicious PDF — malware analysis report

Static analysis result for SHA-256 150941727f56ce33…

MALICIOUS

PDF

75.7 KB Created: 2021-04-08 20:52:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 7bf68a9ebb22eb66f2b95726d3c82c2c SHA-1: 691f6c9eb243a2a06b5c796f019028ddaea2f1ca SHA-256: 150941727f56ce338fcde4c92aa80f81ab9d7d3cf70428b348355650a49afcbf
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, indicating a malicious intent to obscure the true destination. The ML classifier and ClamAV detection strongly support the malicious verdict, suggesting this PDF is designed to deliver a payload, likely through the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/strik?utm_term=logitech+k400+plus+tv+driver+download PDF link annotation
    • https://cdn.sqhk.co/pozigafo/idgdqqn/kulifuwuxomizux.pdfIn PDF document text
    • http://fivabigenarewo.22web.org/lusofobafanofasu.pdfIn PDF document text
    • https://tukevepa.weebly.com/uploads/1/3/0/8/130814993/d0016dd2df6b.pdfIn PDF document text
    • https://kexizinakit.weebly.com/uploads/1/3/4/8/134870698/wotivoge_losibej_zopujefemenib_gekofolex.pdfIn PDF document text
    • https://cdn.sqhk.co/gazamara/jAz1TUG/tvf_bachelors_season_1_full.pdfIn PDF document text
    • http://sdfsdfsdf.shaketorch.com/letixizadulatagotin.pdfIn PDF document text
    • https://cdn.sqhk.co/bopesajan/b0sINhe/vomigug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://virujafaxamer.epizy.com/52359907444.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cabfda5-c374-47d3-9e5d-e26f4ac36808/navy_civilian_jobs_pay_scale.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/bitumen_content_test.pdfIn PDF document text
    • http://saduzubut.rf.gd/ballistic_galvanometer.pdfIn PDF document text
    • http://dozesika.epizy.com/15785297411.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/what_is_public_knowledge_base_salesforce.pdfIn PDF document text
    • http://zovebosovu.rf.gd/61672934341.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b0a88bf-6141-443d-866a-d619e434ed3d/bojulugazenizodolup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faf4c005-2690-43bc-ad34-abc6ec965d4a/linavadamalolifimanike.pdfIn PDF document text
    • http://texizozajon.rf.gd/bse_odisha_5th_class_book_download.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/bangla_academy_english_to_bangla_dictionary_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2893122b-8c11-4ce6-9a27-2bbfd62aaccb/46644263253.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/subefowufosimorisabal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/931438d3-1164-4758-9b0e-94c79f001ff5/jedajolalikomizivajo.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_off0000e8cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CF 5724 bytes
SHA-256: d0dc025a79adcc9fe3af3099325c223ffe9ddf627dbc75b3b9538114f6777e81
font_01_sfnt_off0000fc6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6A 10892 bytes
SHA-256: 54e793fd9bb6944cf58deadde49130a4832dc9d3c70cd413b6385aca619bcb21

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