Malicious PDF — malware analysis report

Static analysis result for SHA-256 079d324db7df7e14…

MALICIOUS

PDF

77.8 KB Created: 2021-03-15 17:12:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 15a0c29037133bdb6fe76bb7e8b2d89b SHA-1: 1c0a07906f005506c745badd32829de31b8e5b54 SHA-256: 079d324db7df7e1468514b59aff145afa012401f8ad1fa5f35ce7ffb0a5e9272
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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/123?utm_term=face+app++apk+pro PDF link annotation
    • http://zujewubowufonug.scienceontheweb.net/beautiful_names_and_attributes_of_allah.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/65669901132.pdfIn PDF document text
    • http://dkmz2.club/48027493735sri4t.pdfIn PDF document text
    • http://talajifit.mywebcommunity.org/cuisinart_toaster_oven_tray_replacement_tob-40.pdfIn PDF document text
    • http://qwonder.space/english_grammar_exercises_online_with_answerse8605.pdfIn PDF document text
    • http://zofunubesosena.mypressonline.com/the_crown_cast_season_4_prince_charles.pdfIn PDF document text
    • http://bulibujirifubof.scienceontheweb.net/easyacc_power_bank_model_pb10000c.pdfIn PDF document text
    • http://lubevos.scienceontheweb.net/2599520672.pdfIn PDF document text
    • http://bopolubolef.mywebcommunity.org/pivefe.pdfIn PDF document text
    • http://kipokefurur.mygamesonline.org/wipusefasawawebukuvuvuw.pdfIn PDF document text
    • http://xedeporib.medianewsonline.com/ap_beverages_corporation_recruitment_2020_notification.pdfIn PDF document text
    • http://tiwimifozukimu.medianewsonline.com/french_to_english_pronunciation.pdfIn PDF document text
    • http://potuxoposutu.medianewsonline.com/face_3d_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f62823ea-e863-4eb7-bd7c-e3bac0139ff1.filesusr.com/ugd/8c639a_060b0af9e8594bb08d90d01020d73f75.pdf?index=trueIn PDF document text
    • https://a3e8d6b6-68ee-4625-a313-a25a09dbd39d.filesusr.com/ugd/312e12_a78dd7b387f7438685f345dd8a2dcaef.pdf?index=trueIn PDF document text
    • https://5849b288-062f-49f8-a71b-da420f1f00fd.filesusr.com/ugd/c068f8_a34a2e86914446c894427d0428ab1675.pdf?index=trueIn PDF document text
    • http://pivimufe.atwebpages.com/what_are_the_social_problems_of_indian_society.pdfIn PDF document text
    • https://1864c106-1a4f-4194-99fb-dabd5a0af450.filesusr.com/ugd/17b194_644ccfbba77149788290cb7e23b5e2d5.pdf?index=trueIn PDF document text
    • https://5ac9d038-517d-4536-97f6-676423289421.filesusr.com/ugd/b444d4_76474647bd7b4909a5a2a02da4ee783e.pdf?index=trueIn 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_off0000e763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE763 4736 bytes
SHA-256: 4c702e7341cb5e8f1c76d1dab895d6008cdc00411150d53cc8412beb0cb4d52d
font_01_sfnt_off0000f795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF795 22228 bytes
SHA-256: 4932c44d6944d30eb73b77ae8eac9cfa8871e1a64e9bcbcb22bf22ad4d4e5e65

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