Malicious PDF — malware analysis report

Static analysis result for SHA-256 33347645e5a41d9a…

MALICIOUS

PDF

79.6 KB Created: 2021-04-01 13:21:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: ea51bb711160d0f2380fd9c45cbd0ba0 SHA-1: a48f6bf4386964233675294b7b8bdb19bda290a4 SHA-256: 33347645e5a41d9ade53dc4fa0e81dab60bdfdad116f72d0724f6b468d094325
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, with a primary suspicious URL pointing to a "mobile strike gold generator no survey". While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lozipotod.ru/wix?keyword=mobile+strike+gold+generator+no+survey PDF link annotation
    • http://byseles.xyz/what_is_the_gdp_rank_of_india_in_2020t9qdv.pdfIn PDF document text
    • http://gakmancreatures.ru/xobapanakatitipugifoway4goa.pdfIn PDF document text
    • http://jakartapro.xyz/harris_burdick_missing_in_veniceoz9me.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://spencermcman.us/logavagifijamekadonejuxe3jqt6.pdfIn PDF document text
    • http://cetapp.xyz/foucault_the_order_of_things_sparknoteskairu.pdfIn PDF document text
    • http://japancar-sib.ru/73818579997ue5hq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/c593889b-79d7-4b6c-93cc-3eba9af77d06/english_for_business_communication_teachers_book_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/80107475881.pdfIn PDF document text
    • https://8c0e102b-efba-4641-b7fc-347c26357927.filesusr.com/ugd/d420ee_b295e6059abe4fa6acffc1a3d7c493db.pdf?index=trueIn PDF document text
    • https://07d68bf2-0661-47e2-9ffe-eae068a071af.filesusr.com/ugd/fef806_8e80e4e26ee946e6bfe67cf4e5ac5d21.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/08d7b114-3c83-4f80-b17b-20e837758606/61794038991.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e035a998-3865-4a9a-860f-bc639d78d24e/sekelavo.pdfIn PDF document text
    • https://cbf60184-924b-4e65-abc2-244eb733ec12.filesusr.com/ugd/9a25f9_4e75e1b7627f4194ad3ae23eeedf4634.pdf?index=trueIn PDF document text
    • https://011f98f8-b45f-4578-a2fd-466b530f7845.filesusr.com/ugd/74e905_44518afa3aae4b51a6e178bb1a3c5494.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/vewiwateberamarovatazufiv.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/cause_and_effect_reasoning_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/685fc155-bbe1-44b3-9260-1da093f5e1b2/10207364952.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/minority_report_precog_ball.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/how_many_btu_to_heat_a_2000_sq_ft_house.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9F 5244 bytes
SHA-256: 3eaa2bfc34963e79bd3232c53c94196fe260d29fd90cb08b2f0fd9ec8373750c
font_01_sfnt_off00010186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10186 9996 bytes
SHA-256: 317767e63707fcfebae8d318fbad76d4991b9dfcf15d2c04b3796c661f0b7a38
font_02_sfnt_off000123bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123BC 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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