Malicious PDF — malware analysis report

Static analysis result for SHA-256 abe3cf878f9f4a8e…

MALICIOUS

PDF

71.4 KB Created: 2021-03-14 11:30:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c4d053e78443c85333132e6d1d9dfdb3 SHA-1: d6661809b8e74189883011604ef2c6499b43313e SHA-256: abe3cf878f9f4a8ee495341395fea216b2e46175ca99c810b853ade64f2269ce
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://vilenefex.ru/123?utm_term=siklus+akuntansi+pemerintahan+pdf PDF link annotation
    • http://naturfresh.fun/54774601316mpi68.pdfIn PDF document text
    • https://girenofozajete.weebly.com/uploads/1/3/4/4/134476001/mawejivepinubib-sazalukomu-kaburu.pdfIn PDF document text
    • http://tryporte.xyz/dish_hopper_with_sling_upgrade_cost53frx.pdfIn PDF document text
    • http://wwbook.org/motorola_verve_buds_110_price_in_qatarreb1h.pdfIn PDF document text
    • https://sanuvexugivi.weebly.com/uploads/1/3/1/6/131606490/nivofok.pdfIn PDF document text
    • https://jowozulabu.weebly.com/uploads/1/3/4/0/134013075/rofelifepabedas_sepimij_feguz.pdfIn PDF document text
    • http://vashobereg.com/wall_street_journal_bias_quoranslwi.pdfIn PDF document text
    • http://italdom.fun/kagirubuwuvuwivozidobe7layl.pdfIn PDF document text
    • http://mylic.ru/naruto_databook_4_english_free_downloadu46po.pdfIn PDF document text
    • https://fogoranamixite.weebly.com/uploads/1/3/5/3/135390362/parikoja.pdfIn PDF document text
    • http://alcozerox.com/magna_carta_definitionqnfcd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dadupawo/juxivijumubugu.pdfIn PDF document text
    • https://77a80da1-97a3-4b40-ba11-54c6d232eb66.filesusr.com/ugd/39a0fd_a011567be52a4466b6e8cd956f81a47c.pdf?index=trueIn PDF document text
    • https://3caa4030-7dd6-4be4-8a8a-e1981c45b3cd.filesusr.com/ugd/704988_4105f1f9197243458aa9983edc42be04.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/auto_call_recording.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/jojidetamiw.pdfIn PDF document text
    • https://2ddc7431-ff91-46e9-9708-195efd6cc195.filesusr.com/ugd/ffe0d3_edfed43a005449c0b43f5c316dcee563.pdf?index=trueIn PDF document text
    • https://eee7329a-c4d5-4508-a8fd-a8ba515f7d9f.filesusr.com/ugd/5ed802_94f4a1dcf557412e9714899bcb1f2853.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/2988446302.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/79392963480.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_off0000dae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE9 5448 bytes
SHA-256: ff280c01dde51472c69357900cbb4d7f52e3baae7f6607cfde0efa12e54f229f
font_01_sfnt_off0000ed48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED48 10284 bytes
SHA-256: 5fd80403c09c025d1d6ea52a2f82861ba555c0d156eacc42ed07599372f397c6

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