Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6415d4c3f31158a…

MALICIOUS

PDF

80.0 KB Created: 2021-03-25 10:28:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 249565f4ffa4db1209418fc22ade6bc8 SHA-1: 601b029a12664dd71ef9d992df1ce6c43ef83cdb SHA-256: a6415d4c3f31158a083520ad4dce3117775f85135190b5809ebd713183a7f36f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a link farm detection and a ClamAV signature for a phishing trojan. The document contains numerous external links, with one pointing to `https://ponafet.ru/wix?keyword=drugstore+cystic+acne+treatment`, suggesting a lure for users interested in that topic. The presence of a link farm indicates an attempt to generate traffic or distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/wix?keyword=drugstore+cystic+acne+treatment
    • https://cdn.sqhk.co/pekobenew/PhdzR2W/vanavodona.pdf
    • https://cdn.sqhk.co/tibakekavero/dhiCdha/ripezi.pdf
    • https://cdn.sqhk.co/bexutavukaro/hixTNrY/anthem_game_in_parts.pdf
    • https://cdn.sqhk.co/zubavagi/phggfjb/demiwozowekawolujomati.pdf
    • https://cdn.sqhk.co/jitolado/jagfghC/68861110733.pdf
    • https://cdn.sqhk.co/moxoxitij/Pa9Fifc/maserati_quattroporte_2014_specs.pdf
    • https://cdn.sqhk.co/pajijolabalu/qOWgdKx/60370636001.pdf
    • https://cdn.sqhk.co/dikapagoloza/igirwa2/gry_rio_rex_poki.pdf
    • https://cdn.sqhk.co/mukibusu/vjjqgeO/hey_clay_animals_dog.pdf
    • https://cdn.sqhk.co/laruxibut/hnTgHUW/bedatewutu.pdf
    • https://cdn.sqhk.co/zarejesorufo/csjeCrF/58576748855.pdf
    • https://cdn.sqhk.co/naludibeg/sfgeidj/apple_watch_gucci_band_real.pdf
    • https://cdn.sqhk.co/sirijunubi/kfqZYhj/salokatewivimevodabolud.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://manomiwivisuf.epizy.com/jedipowaxebujani.pdf
    • https://665985ba-8e9f-4173-b993-17a3090d61d7.filesusr.com/ugd/08421c_a41339cabf5d422e88d6f1e16f47891d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/defcc12d-b34e-4d18-9c26-6896de42ce0b/pelicula_caballo_de_troya_1_completa_en_espaol.pdf
    • https://8d928d4c-4e32-4dc6-8093-d383c90b3cca.filesusr.com/ugd/b5d49c_a4e6089816394f9f87120b77fc290f4e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/89000f91-2fff-4c11-b020-aa05c351d9b0/soluce_new_super_mario_bros_2_switch_2020.pdf
    • https://95049c82-e412-4913-a0b0-e03e83d5170a.filesusr.com/ugd/127d6e_c4a62c0cd3a64a96b96c20ea74b561fc.pdf?index=true
    • https://af0fe010-594a-4ec7-a26b-e2d78e33490d.filesusr.com/ugd/7d2910_494df481ebf2403684c4897cca9aaebf.pdf?index=true
    • https://434dcbc4-7bd9-40fe-99bf-e102daebf961.filesusr.com/ugd/07ef24_afe9cd2dae824f66b0e2d082fd82dbb7.pdf?index=true
    • http://domidezoraz.epizy.com/daewoo_ac_remote_code.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_off0000fc63.bin
5c159184cf94951a46254f45cc9595f95962386422a52149ae0698b1b0d80cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC63 5188 bytes
font_01_sfnt_off00010e05.bin
a9f6610266d809bccad20e612bdb17e058d805d68e43ceffb00989e94505da6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E05 10852 bytes

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