Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c0e6a69847b090d…

MALICIOUS

PDF

69.1 KB Created: 2021-03-18 00:14:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1b94cbee33eb6a77ec1008acdeb8c4d7 SHA-1: cc321f9c08c931dae927ada1c02fcba4da484bea SHA-256: 1c0e6a69847b090db2d991b27b85bc8c5cb43d2b33c9d8b4e3fa522e5727d3ae
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on disposable domains, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains text related to 'Authorization to release information', which is likely a pretext to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://gimoguvi.ru/123?utm_term=authorization+to+release+information+in+spanish PDF link annotation
    • http://fivadoguna.medianewsonline.com/openfoam_boundary_conditions.pdfIn PDF document text
    • http://wobafobigo.mywebcommunity.org/lspdfr_force_callout_not_working.pdfIn PDF document text
    • http://generatorsale.ru/71600724665n2iux.pdfIn PDF document text
    • http://allieshouseofhope.com/zisutotinjf1r.pdfIn PDF document text
    • http://xtrading.buzz/lymphatic_systemdc4n2.pdfIn PDF document text
    • http://bonmarket.site/what_is_the_difference_between_lexus_gx_460_and_470fmf62.pdfIn PDF document text
    • http://vekvelo.ru/47937935386qc4td.pdfIn PDF document text
    • http://gagogepatajebe.medianewsonline.com/67979775822.pdfIn PDF document text
    • http://vavazexowupex.medianewsonline.com/baby_bullet_steamer_measuring_cup.pdfIn PDF document text
    • http://discount50it.pro/msc_salary_in_pakistannayto.pdfIn PDF document text
    • http://larebalin.mypressonline.com/ikea_malm_full_bed_slats.pdfIn PDF document text
    • http://pewadulojuba.mypressonline.com/my_kindle_is_not_charging_properly.pdfIn PDF document text
    • http://santaparker.store/2004_chevy_avalanche_manualu5fkp.pdfIn PDF document text
    • http://smartycredit.info/the_shining_twins_scene_analysis4oc18.pdfIn PDF document text
    • http://nitesufi.sportsontheweb.net/90929283130.pdfIn PDF document text
    • http://wowogobofomufu.mygamesonline.org/possessive_pronouns_in_arabic.pdfIn PDF document text
    • http://gigezesuzobe.getenjoyment.net/business_english_in_use_intermediate.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/rujimidujek/12793171158.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/how_to_connect_my_momentum_camera_to_wifi.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/swellnet_cronulla_surf_report.pdfIn PDF document text
    • https://ba85394b-11ac-4ca4-926b-74ca936c52e1.filesusr.com/ugd/5ccfc8_b25c40a6273b4bd3a8423c31a8cc32f3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fibesezati/clue_board_game_answer_sheet.pdfIn PDF document text
    • https://c07b3cb0-7d4a-4e65-9c62-eb3bd0ce3b6b.filesusr.com/ugd/7560d5_66a3191bb8c547b39a4a9629f09fbb82.pdf?index=trueIn PDF document text
    • http://ropupifalapoges.atwebpages.com/luriwigawapuputopur.pdfIn PDF document text
    • https://s3.amazonaws.com/zatasipezeg/canada_food_guide_2019.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_off0000cf25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF25 5180 bytes
SHA-256: 6ad06143b4524f1642e89ed2d819c3caf7103b8d119b8ffb1074130e4e1f8fa0
font_01_sfnt_off0000e0a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A0 10640 bytes
SHA-256: b539dc646e1cc876e2520310ec7840aea5e6a9af1a73cb893f41e397ef5e7824

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