Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7117f9106da3003…

MALICIOUS

PDF

80.8 KB Created: 2021-03-26 08:56:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e12fe75574bcf0d881180aaa9ceca8ab SHA-1: a67b9d5cc972798f27be52cbaa02180c72eab583 SHA-256: f7117f9106da3003417340609e1ee0490922e092e28d043cd7efb4d0b7ed68d4
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The embedded content and heuristics indicate it functions as a link farm, directing users to potentially malicious content hosted on disposable domains. The primary lure appears to be 'anti stress cracked apk', suggesting a phishing or malware distribution attempt.

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://baarspo.ru/wix?keyword=anti+stress+cracked+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4394066/normal_605c3575b2562.pdfIn PDF document text
    • https://botiwugagow.weebly.com/uploads/1/3/1/8/131872238/sopizew_bidemofamir_zuwovo_jixaxe.pdfIn PDF document text
    • https://cdn.sqhk.co/pepitaji/jcvKZ46/teziwe.pdfIn PDF document text
    • https://cdn.sqhk.co/salenasova/wJhd0hb/run_ninja_run_action_game_online.pdfIn PDF document text
    • http://vupojijodo.iblogger.org/wemalurafaziperigiwumat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368760/normal_604a346c6c8e5.pdfIn PDF document text
    • https://cdn.sqhk.co/karopepagu/74qBqif/90300656830.pdfIn PDF document text
    • http://pudumalezedokav.22web.org/2397387136.pdfIn PDF document text
    • https://vasubuvedebo.weebly.com/uploads/1/3/1/8/131871593/fb2eaca25.pdfIn PDF document text
    • https://mobugozuko.weebly.com/uploads/1/3/4/8/134869294/wororixuxikenekuk.pdfIn PDF document text
    • https://xuvitekopa.weebly.com/uploads/1/3/2/7/132712193/gedabi_tifijokozin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vaxuxosubize.epizy.com/mendelian_genetics_worksheet_answer_key.pdfIn PDF document text
    • https://11ab4cf5-156d-4417-99e9-5039b2a7eb5f.filesusr.com/ugd/82d61e_d3a291e756994a92b558e7f143483ec3.pdf?index=trueIn PDF document text
    • https://03aaa7dd-6608-466c-a68c-f41c59811c05.filesusr.com/ugd/ae15ca_6f3c1aebae104dffa475807e6f2ff3e3.pdf?index=trueIn PDF document text
    • https://2ea3657d-1c4c-40dd-8491-58aeeb8dc933.filesusr.com/ugd/18a85a_ffb9e9565ecc43e2ae05f451d0e8bd5f.pdf?index=trueIn PDF document text
    • http://zilapiwet.epizy.com/bloons_td_6_hacked_apk_2._1.pdfIn PDF document text
    • https://6a24fdd2-d4a5-4c4b-882b-0f3115751bcf.filesusr.com/ugd/04e6f9_a99c7bafebf24577946bcbcbd0f0f623.pdf?index=trueIn PDF document text
    • http://fakoxogotavure.epizy.com/33993537174.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_off0000eb4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4B 5088 bytes
SHA-256: fa109ac3b9dde192a48926b3aa19c1bb5d7a48d3db4a57f8217ccfa99f992b74
font_01_sfnt_off0000fca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA8 10756 bytes
SHA-256: dc6889bf574c77d4bc4b3f97becb47f0fb2a75003645016c32d8aeb92d7eb358
font_02_sfnt_off0001216e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1216E 16080 bytes
SHA-256: 1b0369eea38b5debab7c6d130bc4ebbf5c3b8593234d069837611ab7ad627e7a

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