Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c0eaeec371b0e8c…

MALICIOUS

PDF

77.9 KB Created: 2021-03-11 04:56:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 065a4a777710149feb2bcebcb2bafc80 SHA-1: f6e8dd0c07919071e86fea5f15056ce8c2515d0c SHA-256: 4c0eaeec371b0e8c3c3c3823626f0cac4fe7d7fc6022d4175326cb86574627d9
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, with the primary malicious URL being https://jacksth.ru/123?utm_term=anita+baker+greatest+hits+zip. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0'. The document body is heavily obfuscated, but the presence of numerous external links suggests an attempt to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jacksth.ru/123?utm_term=anita+baker+greatest+hits+zip PDF link annotation
    • http://dujojiwasemob.mywebcommunity.org/conflict_resolution_examples_for_nursing_interview.pdfIn PDF document text
    • http://guitar.su/71317059423c4dbr.pdfIn PDF document text
    • http://zotikarida.medianewsonline.com/vesopo.pdfIn PDF document text
    • http://lazirog.mywebcommunity.org/42748274356.pdfIn PDF document text
    • http://money-team.site/biomagnetismo_goizu1id5.pdfIn PDF document text
    • http://bugosegu.scienceontheweb.net/stock_market_crash_great_depression_causes.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/f0df138b-54e8-403e-a772-222d4d8ddfce/true_trip_jet_diver_depth_chart.pdfIn PDF document text
    • https://e50eee24-2d95-422d-8083-6f618d95927b.filesusr.com/ugd/594ae5_fbede02ea6e9407d816596765c57ddbb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/aaruthra_full_movie_in_tamil_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79d18cda-ee31-4f1c-b247-459e346fd997/jufebepufemog.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/eddy_current_braking_system_project_report.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/24918487690.pdfIn PDF document text
    • http://winimoviwimi.myartsonline.com/subtracting_mixed_numbers_word_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/portaldoempreendedor_gov_br_mei_microempreendedor_individual_formalize.pdfIn PDF document text
    • https://ebba3e40-d49f-4cc8-b137-373bb1124918.filesusr.com/ugd/384ea4_e48a6772c0aa41a28df9be221410cfad.pdf?index=trueIn PDF document text
    • https://ac402fee-74f4-49a6-b5a4-6a03c6a057de.filesusr.com/ugd/b0cd75_ba8e4b26ecdc49b0894bcf190eb14391.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/kalosamojalozamixunipo.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/tenuzemenevojaxizedon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68e5e5f7-9432-41e8-8e4a-429a9745132a/forklift_driver_license_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9f0f143-112e-470e-8e87-59f34433db68/94302606023.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/3d_face_scanner_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/vogal.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/vishnu_sahasranamam_lyrics_in_hindi_with_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/720ac8d7-88a3-433e-879c-12ec108b9c98/when_does_the_8th_harry_potter_movie_come_out.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_off0000e850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE850 5292 bytes
SHA-256: 89a8988b9d636f854632eea86798e8869cc9cf564271d51530d6fa6a93bd3a87
font_01_sfnt_off0000fa55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA55 13436 bytes
SHA-256: 4dc0bb85b7c593e6c5016f7b289502e062ea7fd55f5ef2d4ded37c580304684a

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