Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffea2ecbc54237c0…

MALICIOUS

PDF

82.1 KB Created: 2021-03-25 06:40:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 17fa7e8141bb450c5846a3453ce97ce9 SHA-1: 250f8e6e51fc78b4e027e50abda925f9da675e7b SHA-256: ffea2ecbc54237c0b3150dcc9a9ee5bc52d966cc6faacbc42dd976b86daf91b2
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, many pointing to disposable hosting, and is identified as a link farm. The document body is heavily obfuscated, but the presence of external links suggests an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://botokaw.ru/123?utm_term=el+alquimista+libro+pdf PDF link annotation
    • http://nuxipawuxodiwa.getenjoyment.net/appareil_urinaire_schma.pdfIn PDF document text
    • http://goxivomibivufuv.mywebcommunity.org/bepopizikodokisazilili.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413969/normal_6059129c46ea9.pdfIn PDF document text
    • https://cdn.sqhk.co/wesebewoweva/HZsiShe/gefojutotugizasun.pdfIn PDF document text
    • http://mir23.xyz/hole._io_local_multiplayer_gonegmbm1.pdfIn PDF document text
    • http://esclub.pro/pitch_anything_summaryqwhlf.pdfIn PDF document text
    • http://capridigi.com/43303683112nb54e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476751/normal_6000bc3f3bc77.pdfIn PDF document text
    • http://burrrhey.tech/real_estate_investing_beginners_guide1sv69.pdfIn PDF document text
    • http://jajuviramigawo.medianewsonline.com/basic_electrical_network_theory.pdfIn PDF document text
    • http://roralukomoko.22web.org/the_kiss_quotient_book_movie.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476582/normal_604aeed235528.pdfIn PDF document text
    • http://erse.xyz/61483646721vcdzu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374211/normal_5fdcd475827d4.pdfIn PDF document text
    • https://cdn.sqhk.co/xeloxilava/gjia4tY/include_soap_fault_in_wsdl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lapetagalelan.myartsonline.com/6784718460.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/104a910e-9c51-4a8a-972d-0a47b8bbc94d/fibizugazovozikiwotuv.pdfIn PDF document text
    • http://rogofideb.onlinewebshop.net/21193631297.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/575dd661-5ecb-435b-a3d4-cd08a2237b45/the_human_endocrine_system_is_made_up_of_which_of_the_following_structures.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b68da891-d076-4f24-b096-e374083555c7/divina_commedia_inferno_canto_15.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a56ba7d-50c8-4dd5-a1a0-cbdfc493b45f/how_to_learn_latin_and_greek.pdfIn PDF document text
    • http://gesorowar.rf.gd/xagixofe.pdfIn PDF document text
    • http://nuxumejaxumem.epizy.com/28089970166.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C5 5412 bytes
SHA-256: f434502123d302fcd04a2580930c2cb896eb19a815f739d55f6c647a37eca9ee
font_01_sfnt_off00011309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11309 11912 bytes
SHA-256: 4f49682256723dc8a4f33def2afbc561ec6cab791c65123cd4e5988a99a586ac

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