Malicious PDF — malware analysis report

Static analysis result for SHA-256 7da642c360b3ae43…

MALICIOUS

PDF

80.9 KB Created: 2021-04-04 17:35:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5f79df1b2844cc2331e55721631e1a4 SHA-1: 725f88c45daf84a094686c3fa9a8b0ed217f3441 SHA-256: 7da642c360b3ae431841803e4c9748c7020830b0abddd3b2b2c737edec9b78f8
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to trick users into downloading further content.

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://maypoin.ru/wix?keyword=apk+popcorn+time+pro
    • http://yewes.space/guitar_chords_book_free_downloadhgvtz.pdf
    • http://zimezobot.getenjoyment.net/account_manager_responsibilities.pdf
    • http://wegansit.space/sweet_polly_oliverbzm3d.pdf
    • http://tixshopclub.space/26907399244j78fe.pdf
    • http://dommasters.site/english_literature_and_composition_november_cotton_flowergi8yn.pdf
    • https://vovazukaliwo.weebly.com/uploads/1/3/5/9/135962855/609434.pdf
    • http://lisuzigerob.mygamesonline.org/array_in_cpp.pdf
    • https://warororob.weebly.com/uploads/1/3/5/3/135314520/9407368.pdf
    • http://abanca-electronica.com/most_popular_android_apps_2019ekcye.pdf
    • http://meetsalle.xyz/wibozowojixasituvosenudowjdjtt.pdf
    • http://omoikiri.info/echo_pb_250_owners_manual8xhte.pdf
    • http://ronifibofizet.medianewsonline.com/how_do_you_get_microsoft_flight_simulator_on_xbox_one.pdf
    • http://shoop-fe.ru/41939283779cz6wz.pdf
    • http://zitupow.medianewsonline.com/corsair_k95_platinum_xt_vs_steelseries_apex_pro.pdf
    • http://winoraama.space/fgo_camelot_guidei6jl2.pdf
    • http://natural-shop.info/80026344457ey255.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8040f97e-36aa-40af-a4bb-6956766f1aff/xuruvitar.pdf
    • https://s3.amazonaws.com/tibitexil/amiga_cd32_bios.pdf
    • https://s3.amazonaws.com/leteraxewe/acr_earlswood_3_manual.pdf
    • https://uploads.strikinglycdn.com/files/8c6f1545-bdce-4e94-97cb-d39491255bce/whirlpool_jacuzzi_tub_repair_near_me.pdf
    • https://s3.amazonaws.com/jusuberu/sap_fiori_interview_questions_and_answers.pdf
    • https://uploads.strikinglycdn.com/files/ae6626ec-bc9b-4c70-9c2c-ed2d5cc0b289/dizirotugufozozazexoremax.pdf
    • https://uploads.strikinglycdn.com/files/eb7db14f-df4c-4345-a56d-4a71cc6e4a56/sun_tzu_know_your_enemy.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb69.bin
087bb1afb7fc7d2827d30c963133a9fed705a3b23bca006ce27e41ebaf1fabea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB69 4712 bytes
font_01_sfnt_off0000fb62.bin
6d7d2d6646c1cf62bfedfef89293c6f4c5a2b3c5449ebadc7d8cf7369338bbeb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB62 10796 bytes
font_02_sfnt_off0001205f.bin
f267a97a42ed964490c0c36cf8d24d30f5cfc386ee24850e75bb3a4991f11828		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1205F 16376 bytes

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