Malicious PDF — malware analysis report

Static analysis result for SHA-256 142b246adb2cc186…

MALICIOUS

PDF

97.3 KB Created: 2021-03-19 22:22:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 507b6aa16b1b02310131ba60dc1ec124 SHA-1: e6e11d3f338b8b32f83850d01de6f35fdb3b04e0 SHA-256: 142b246adb2cc18629cc93d806bfe9989bac0af306c61363c3a52c78ddfb7b56
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, suggesting a link farm or phishing attempt. The primary malicious URL identified is https://lozipotod.ru/123?utm_term=los+angeles+clippers+schedule+pdf, which is likely used to redirect users to a malicious site. No scripts were extracted, but the PDF structure and numerous external links indicate a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=los+angeles+clippers+schedule+pdf
    • https://ninofupefuf.weebly.com/uploads/1/3/1/8/131856131/b7b198a553be0.pdf
    • https://jokikisiva.weebly.com/uploads/1/3/0/8/130873994/sevuwigelepubogir.pdf
    • https://lamuwibosuzo.weebly.com/uploads/1/3/1/0/131071033/xolebupoju.pdf
    • https://nuralizowipu.weebly.com/uploads/1/3/4/6/134693001/2302d8a7438f5.pdf
    • https://batebabegusuk.weebly.com/uploads/1/3/1/4/131437625/vasemal_vexigo_vozopigudetug.pdf
    • https://wugoxuvalego.weebly.com/uploads/1/3/4/0/134017666/xalepoxawuxet_jemikulujo_fuguwetemonup_rexuraluda.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/25a3b21c-a084-4e8a-8c01-70ace30a09a7/1458620177.pdf
    • https://s3.amazonaws.com/gezizefefififa/femafiroj.pdf
    • https://uploads.strikinglycdn.com/files/7a7f6aaa-874e-4dd8-870c-aa8fa7135322/how_much_do_refrigeration_technicians_make.pdf
    • https://uploads.strikinglycdn.com/files/d559d9b9-2961-47e1-b755-01c198a3661c/48338071740.pdf
    • https://uploads.strikinglycdn.com/files/d7b934d4-c244-48a2-a606-b454dbfc60d4/kafusibuxuzi.pdf
    • https://s3.amazonaws.com/toliwudalamem/how_do_i_know_my_liftmaster_model_number.pdf
    • https://uploads.strikinglycdn.com/files/d95c5a40-8690-481f-a220-1be2b527f954/heat_n_glo_gas_fireplace_keeps_turning_off.pdf
    • https://s3.amazonaws.com/lixuduwonifa/ensayo_alcoholismo_en_adolescentes.pdf
    • https://s3.amazonaws.com/xisakazelelinim/15142045448.pdf
    • https://s3.amazonaws.com/zetubakuz/zamakirinakukabaguberak.pdf
    • https://s3.amazonaws.com/budovewesekaz/25808514028.pdf
    • https://uploads.strikinglycdn.com/files/eaf5daf8-9b14-48ef-9da8-c88e52f30bb4/97562881585.pdf
    • https://s3.amazonaws.com/xixonu/edexcel_a_level_physics_revision_guide.pdf
    • https://s3.amazonaws.com/wewuxuviwar/angular_simple_login_form_example.pdf
    • https://uploads.strikinglycdn.com/files/619f31bc-5f7d-479d-a198-82e54bff6b7f/47898158981.pdf
    • https://s3.amazonaws.com/watajive/casio_fx_cg20_programs.pdf
    • https://s3.amazonaws.com/geraromu/nike_corporate_strategy_2019.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013d4d.bin
e5d1a016dc38287cd38170d4035fecc7311cee6ae9326db23f371c80753f742c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D4D 5360 bytes
font_01_sfnt_off00014f87.bin
9dec3ed21bd3fa606af4121cb2ec8bea162a6fcfd840f5075f7450f6e1c802c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14F87 12044 bytes

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