Malicious PDF — malware analysis report

Static analysis result for SHA-256 44d9672987df3642…

MALICIOUS

PDF

99.2 KB Created: 2021-05-02 20:07:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3a759079ea2908df7b9d06ae66096746 SHA-1: 59550fca665457391379c1f1eed22b8be22071e1 SHA-256: 44d9672987df3642ab308973838cdc1ffae674a88e02b351b36a1ec4bbcd7a4d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9988

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://dugedepap.ru/strik?utm_term=divina+commedia+canto+13+inferno+analisi PDF link annotation
    • http://sebevifa.getenjoyment.net/arnis_philippines.pdfIn PDF document text
    • http://zoguponuwuxoli.medianewsonline.com/64991702221.pdfIn PDF document text
    • http://tilosag.mypressonline.com/30413670599.pdfIn PDF document text
    • http://zokiwedilar.mypressonline.com/ic_cd4093_datasheet.pdfIn PDF document text
    • http://lelekelosutov.getenjoyment.net/raxidenakomuda.pdfIn PDF document text
    • http://nopuvobetag.mygamesonline.org/vufug.pdfIn PDF document text
    • http://wuxetij.mypressonline.com/free_online_translator_german_to_english.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6762652a-e869-40f3-960d-1446d4066230.filesusr.com/ugd/55e6b1_5650cedfa5b9474486b2d44663b9beac.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/30e7dc29-55b2-4cb7-be36-2c79b549ac4e/wozok.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/clothing_worksheet_for_grade_1.pdfIn PDF document text
    • http://libejejizu.epizy.com/logitech_h800_how_long_to_charge.pdfIn PDF document text
    • http://bapejilujuzegu.rf.gd/askep_anoreksia_nervosa.pdfIn PDF document text
    • http://velelakolifuvu.onlinewebshop.net/irritable_bowel_syndrome_guidelines_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/gb_whatsapp_new_version_6._0.pdfIn PDF document text
    • http://vulebirawesajo.rf.gd/good_english_grammar_book_free.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/how_to_use_upholstery_attachment_on_hoover_carpet_cleaner.pdfIn PDF document text
    • https://6b9ff03a-ef48-417a-a14c-919df0f903d0.filesusr.com/ugd/f459ea_f9bc5c675fa345b6b7cf0e42424f2a9e.pdf?index=trueIn PDF document text
    • http://remobufu.rf.gd/zukajikaxobidezuwu.pdfIn PDF document text
    • https://71347f20-8353-4153-bebc-dd2a28b3a5cf.filesusr.com/ugd/a382ee_374de67accd54a578b43734f042a3125.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jiwisi/champion_3500_watt_dual_fuel_generator_manual.pdfIn PDF document text
    • https://61736296-a7da-4228-a4f2-5a582bd9a3aa.filesusr.com/ugd/1c12ee_d6f401e348dc429ba17f1f9d8bb8fed5.pdf?index=trueIn PDF document text
    • http://nixomirorubu.myartsonline.com/aquatic_plants_list.pdfIn PDF document text
    • http://gegavenenuzoba.epizy.com/nezipaduxevalodexovuxu.pdfIn PDF document text
    • https://0ed30ddb-3df1-4505-9e4e-3e87fc6d20ea.filesusr.com/ugd/f043c1_365aa138dabc4e74bc2ecc9b4c29ec42.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d77f2100-95c2-458d-a388-7c6c2fb0f5ed/47470274691.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012dfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DFE 5440 bytes
SHA-256: 47d890e29f0780dd0dbe81dd9333f9fcb6c5dee99ca6d2e2b4e28f36a9bf9307
font_01_sfnt_off0001407c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1407C 11992 bytes
SHA-256: cdfb023286d8450265328074f0896fb610e16a7c450f367217ac75f394dc5291
font_02_sfnt_off000167bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167BF 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd