Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3234191be1a1d96…

MALICIOUS

PDF

77.0 KB Created: 2021-03-15 21:50:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5885fca03a933125d26524f006cbc438 SHA-1: 2f13e6a57b786567920169bfc80b52aa01c2903a SHA-256: a3234191be1a1d96806d93286d3ecb0c4ccd6cbf5e980e48e036e64272138959
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/strik?utm_term=bar+course+fees PDF link annotation
    • http://banademebilite.sportsontheweb.net/89135953782.pdfIn PDF document text
    • http://garanibukumom.scienceontheweb.net/gilejama.pdfIn PDF document text
    • http://nepatokada.mypressonline.com/jemefezajefipatogufenonop.pdfIn PDF document text
    • http://g2am2e.xyz/dake_annotated_study_bible_large_print2hx18.pdfIn PDF document text
    • http://kutejovanog.getenjoyment.net/53897757614.pdfIn PDF document text
    • http://yildirimotobursa.com/application_programming_interfacet8j16.pdfIn PDF document text
    • http://strgb2.ru/zavuvumixhhplp.pdfIn PDF document text
    • http://tovelksa.website/picostation_m2_factory_resetfez87.pdfIn PDF document text
    • http://tevutubiwij.getenjoyment.net/functionalist_theory_of_development.pdfIn PDF document text
    • http://rubisteq.online/california_expert_deposition_objections5tm1q.pdfIn PDF document text
    • http://timinome.getenjoyment.net/how_to_add_memory_to_lenovo_t430.pdfIn PDF document text
    • http://solusaxisabo.scienceontheweb.net/50628572018.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0365bc07-0a82-4519-9878-05ea6cf35ee2/is_cyberpunk_2077_on_xbox_one_good.pdfIn PDF document text
    • http://bebovufuvuji.myartsonline.com/75975111155.pdfIn PDF document text
    • https://31c8a3d4-0132-49f1-a04f-09c79d03e01f.filesusr.com/ugd/a4da84_e2eebc5ef3024306be607c44dd58378b.pdf?index=trueIn PDF document text
    • https://53f03ce6-db0b-4f41-9bfc-6956ba41e1f4.filesusr.com/ugd/727e0f_8528e8aece4b4d368e8e44ac1631552a.pdf?index=trueIn PDF document text
    • http://bibezakomi.myartsonline.com/what_is_color_hue_and_saturation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a856c2fc-37c2-4984-b46d-273194e6763b/cribbage_rules_3_players_go.pdfIn PDF document text
    • https://f87ce62f-3d5d-4c42-bff3-2e7d00444551.filesusr.com/ugd/72ed28_b2746a095c604b20a2a73019ffb7ba34.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d23e50e2-f9c7-40fd-8261-aa5122fe2870/67492837457.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_off0000efb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB9 4892 bytes
SHA-256: b2aa924cda380140c6d8900ab45a3104c6ae70cd444601de3e45d6a5bd75e5ed
font_01_sfnt_off0001006c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1006C 11400 bytes
SHA-256: 4151477c576fce9aac632c0f91a5d9d57defbf986e74b30a8975303a0df1616b

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