Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ceacf63241c1a68…

MALICIOUS

PDF

77.9 KB Created: 2021-03-24 20:46:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d43b1dc829a6425f97ebdf97244ae7a4 SHA-1: 5059f39ee865bbfbbb1e13ce1a830f9c98b86f01 SHA-256: 7ceacf63241c1a68be90976d5d226f666564c3f68d4b81d20c832ed882b148ef
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 critical ClamAV detection and an ML classifier. The PDF contains a large number of external links, suggesting a link farm or redirection mechanism. The embedded URLs likely lead to phishing sites or further malware. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://ponafet.ru/award?keyword=beginner+s+guide+to+digital+painting+in+photoshop+characters+pdf+download
    • http://finonit.mypressonline.com/where_do_babies_come_from_book_for_7_year_old.pdf
    • https://narofuputukate.weebly.com/uploads/1/3/4/5/134585455/ac3a4.pdf
    • http://sifuzifixezija.medianewsonline.com/alter_ego_3_gratuit.pdf
    • http://dabedera.mygamesonline.org/types_of_cyberbullying.pdf
    • https://xufetujada.weebly.com/uploads/1/3/4/7/134745175/mibokavok.pdf
    • http://birapemotafew.mygamesonline.org/studies_in_pessimism_schopenhauer.pdf
    • https://sutivekawexebe.weebly.com/uploads/1/3/1/6/131636655/1933233.pdf
    • https://cdn-cms.f-static.net/uploads/4392218/normal_6024fbe86f85d.pdf
    • https://cdn-cms.f-static.net/uploads/4369146/normal_5fd0f1e52ecf3.pdf
    • http://tameeniraq.com/dipoxavoraz669a0.pdf
    • https://cdn-cms.f-static.net/uploads/4424025/normal_5fd83f8b028e6.pdf
    • https://cdn-cms.f-static.net/uploads/4420476/normal_60269cf1aca9f.pdf
    • http://gejudoxe.mypressonline.com/bujawufukim.pdf
    • http://wopizup.mypressonline.com/dell_optiplex_780_power_supply_not_working.pdf
    • http://pl50off.info/1228747522abiy3.pdf
    • https://cdn-cms.f-static.net/uploads/4453332/normal_603ecf092b4e4.pdf
    • http://jilavixit.medianewsonline.com/37309962368.pdf
    • http://gratoraama.website/lagu_the_chainsmokers_new_song_20174so2u.pdf
    • https://cdn-cms.f-static.net/uploads/4407788/normal_6021f311173f3.pdf
    • https://cdn-cms.f-static.net/uploads/4401983/normal_600afd2015b31.pdf
    • http://warowusavi.mywebcommunity.org/pedro_camina_sobre_las_aguas_biblia.pdf
    • https://cdn-cms.f-static.net/uploads/4370278/normal_6009bcae83a90.pdf
    • https://cdn-cms.f-static.net/uploads/4380695/normal_6010f24e2468f.pdf
    • http://ipatovaalena.ru/what_is_the_role_of_an_eye_in_handmaids_taleefup2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bebovufuvuji.myartsonline.com/wasezovekitululetoz.pdf
    • http://zatuvejamubolo.atwebpages.com/13316470095.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_off0000f26d.bin
3eac0f79e274726c28f17599b4871625e59defe4342c0096596272e8261a3dc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF26D 5556 bytes
font_01_sfnt_off00010568.bin
eee0eb8b187f51a987ac04880cd096d82fc2c353e3cea079a8479d8e3d5b744c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10568 10492 bytes

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