Malicious PDF — malware analysis report

Static analysis result for SHA-256 92a1bcf8905cd9a4…

MALICIOUS

PDF

81.8 KB Created: 2021-04-09 04:16:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d2ff2505a339ea2ac2a37b41ead8a89d SHA-1: 3dc934404b56c972495a211be47ba387a3cdf0f8 SHA-256: 92a1bcf8905cd9a441efb751b89a822c4515e4e266c6cc980b2b1319da058317
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and potentially phishing-related. The document body, though partially corrupted, suggests a lure related to a book summary. The presence of numerous disposable domains and link farm characteristics further indicates malicious intent, likely to redirect users to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://soxebez.ru/strik?utm_term=plot+summary+of+percy+jackson+and+the+sea+of+monsters+book PDF link annotation
    • http://lubevos.scienceontheweb.net/61286643413.pdfIn PDF document text
    • http://delayikapy.xyz/download_digimon_world_3_iso_for_pcofhhj.pdfIn PDF document text
    • http://sallely.xyz/is_hamlet_a_real_storylq13t.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/wasiwo.pdfIn PDF document text
    • http://natur-bio.space/10457472057vjdzq.pdfIn PDF document text
    • http://nigavereke.mygamesonline.org/vogaxaxekem.pdfIn PDF document text
    • http://salleapp.xyz/can_you_use_a_verizon_jetpack_for_home_internet0vw31.pdfIn PDF document text
    • http://nakodinita.scienceontheweb.net/sexen.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/097976f3-4415-42d3-a5ef-6184b9bacb09/dujaxilurov.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/xujam.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/4781362837.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/skin360_face_mask_walmart.pdfIn PDF document text
    • https://b6f97e74-198a-461d-a312-d71b9712332b.filesusr.com/ugd/a2d007_072f73ddc60547b789d8a7d593ecff1b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/70999904141.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4000bd70-691e-4017-87c8-280542b41133/nulavokuwivedutuwemeva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0878a30-c885-4efc-bbdc-e14660944f76/xuxozadoza.pdfIn PDF document text
    • http://tolepovewatug.epizy.com/quadrajet_vacuum_hose_diagram.pdfIn PDF document text
    • https://4b3c1411-62fe-4b74-ac0d-dad8ff5dd90a.filesusr.com/ugd/d10829_e8b7777aeb96446ba482a889d3e333e3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a6f4207-5936-4266-bd06-699fd9ef0d72/javofuxijinewi.pdfIn PDF document text
    • https://46ebecaa-9490-439b-bba6-ee77f1a6ca93.filesusr.com/ugd/cee8a1_72aabdfb9e5d42caabf1b140447597fc.pdf?index=trueIn PDF document text
    • https://40785fcd-1e5e-4316-9306-5db1d5795eae.filesusr.com/ugd/2f07a1_926487aa6c6c46abb662ca15190f52c1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3464f4e8-3bd5-43a7-a43f-f88098099ab8/31674474383.pdfIn PDF document text
    • http://zerakunutage.epizy.com/dapugafejo.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_off0000ffb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB0 5780 bytes
SHA-256: 56b60b884081b065018ef01768cd2559669aa29bf8bfa0e42760663c78acbe93
font_01_sfnt_off00011334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11334 11096 bytes
SHA-256: eaba2a969e3fc6b3852b19d6314501b57722df0f5b0b931fa82e1e19226f3b06

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