Malicious PDF — malware analysis report

Static analysis result for SHA-256 6413e747ad5fcd4d…

MALICIOUS

PDF

78.6 KB Created: 2021-03-09 13:13:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: af7bf4204a57a351a6eb8acbde3d1fee SHA-1: 96b5c494849abb10c9fff3825d08e34214ed5664 SHA-256: 6413e747ad5fcd4d0d5ecca11dab232fd85bc1268adce2ff9b6d398730ba0f07
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to deceive users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://jottigo.ru/wix?keyword=parts+of+speech+exercises+with+answers+printable+pdf PDF link annotation
    • http://ijmalan.xyz/54446635324cpu5x.pdfIn PDF document text
    • http://mmamba.ru/sherlock_holmes_download_in_hindi_filmyzilla8o94n.pdfIn PDF document text
    • http://mesanezedid.mypressonline.com/melesamudezirugarafum.pdfIn PDF document text
    • http://keepxufi.space/atomic_structure_questions_downloadkrxwr.pdfIn PDF document text
    • https://tovunebutulewe.weebly.com/uploads/1/3/1/8/131871744/vibunuzavaxud_rajenomotop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459792/normal_60134d7c1ed68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380219/normal_603b30c01f0b3.pdfIn PDF document text
    • http://madamzero.com/38116390121ge7za.pdfIn PDF document text
    • http://findattime.com/chaturbate_token_tool_verification_kp7afo.pdfIn PDF document text
    • https://kazigujexumakul.weebly.com/uploads/1/3/4/3/134320364/9850213.pdfIn PDF document text
    • http://sport-stavki.fun/how_to_start_a_letter_of_recommendation_for_immigration5nswq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489237/normal_600cc701426d6.pdfIn PDF document text
    • http://raftgjgr.space/dog_temperament_test_formptesj.pdfIn PDF document text
    • http://woxuruko.medianewsonline.com/bluedio_t2_plus_turbine_wireless_bluetooth_headphones_with_mic.pdfIn PDF document text
    • http://iranianvc.com/rogovapibunagatogorojdm9t7.pdfIn PDF document text
    • http://nicechange.space/114220694742uf0v.pdfIn PDF document text
    • https://janogawe.weebly.com/uploads/1/3/0/7/130776821/batugom.pdfIn PDF document text
    • http://nonretloli.site/how_to_use_corningware_browning_dishp6ihv.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/117d633a-c306-43a0-b231-dfcaaa231ea8/19659374035.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1235aa85-a409-4724-be7d-297cbdf63cc8/what_is_the_best_gas_leaf_blower.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68c30114-dc33-40de-bad8-055d06313576/ruzebaxegadipogupimen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cca17e3a-e3ff-4d5b-af26-7e54c94d98b1/zixibu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ee8721e-f377-4646-aa7d-393a6407bbf3/zererolivevet.pdfIn PDF document text
    • http://lapetagalelan.myartsonline.com/gevenidajepi.pdfIn PDF document text
    • http://bexovivuvere.myartsonline.com/can_marlin_model_60_shoot_22_magnum.pdfIn PDF document text
    • http://jowawaba.atwebpages.com/add_files_to_wix_website.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_off0000f43d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF43D 5544 bytes
SHA-256: 0bb4b513af4d904d5c74bf2dbb708de6459b952d8f5d1ffbd0faca61741eaadb
font_01_sfnt_off00010723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10723 10872 bytes
SHA-256: 82a976aa60a7829aa1bfd2edfe5dcae19b079f3438eb201bef206b6220c2fa9e