Malicious PDF — malware analysis report

Static analysis result for SHA-256 42379794a96ef5bf…

MALICIOUS

PDF

174.8 KB Created: 2021-03-17 09:16:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 817732dda326345c22a1651283909151 SHA-1: d7f007ffe0912119287ed490927c860f8606b54d SHA-256: 42379794a96ef5bf5327f138c134a90589e5cbf0d904df0def3fd1d9287cffa5
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 0.9993

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://seumenha.ru/wix?keyword=takashi+morinozuka+voice+actor PDF link annotation
    • https://cdn.sqhk.co/vagizabibo/jcsgf3G/3268175403.pdfIn PDF document text
    • https://cdn.sqhk.co/kewukapugino/jjhfhiz/monster_doll_dress_up_magical_monster_doll_maker.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413707/normal_6024512651e91.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445128/normal_5fcccd6610560.pdfIn PDF document text
    • http://cloudmarket.website/autumn_leaves_song1py8m.pdfIn PDF document text
    • http://a1metromovers.com/lexavibuvejdj9ww.pdfIn PDF document text
    • http://avto-trokot.xyz/populukugepunu22hg.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/giJgjif/pc_building_simulator_mods_installieren.pdfIn PDF document text
    • http://raifaisentgo.online/pre_calculus_grade_11_textbookgmfg7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471686/normal_600020a2a2b7a.pdfIn PDF document text
    • https://cdn.sqhk.co/xibidodoko/ohegcIF/88866373659.pdfIn PDF document text
    • http://momentshop.space/vanatowetepuwozulusorehg4xa.pdfIn PDF document text
    • http://nout-prodat.site/how_many_oz_in_dunkin_donuts_coffeeu2ur0.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/0888a750-b4c3-4802-975d-230ff8e5dbc1/greek_and_latin_roots_words_cogn.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32463873-f0a1-4cf6-b048-9b5b4915ac2a/asm_specialty_handbook_tool_materials.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/lords_of_the_fallen_guide_of_antanas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cf71575-3784-4d80-ad4d-202f1d401b20/pewamuxoza.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/losegoze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e038221f-3ee3-4b2c-a852-b556145d19dc/how_to_descale_nespresso_delonghi_lattissima_touch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9518e62-1e30-4335-95e8-2525d083cdcd/what_is_witchcraft_in_the_crucible.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/44163115755.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/chillagoe_caves_self_guided.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001f0a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F0A8 41996 bytes
SHA-256: 9fa153fbf6ea73e7da52f13e7bc74d1898e2212e6de9ac130e45287ca5ac80ac
font_01_sfnt_off00027129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27129 5128 bytes
SHA-256: 818412c2f7227c9d74c2aa8128c90b52ccb4afc75b391c60accbbb2328f7c627
font_02_sfnt_off0002827e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2827E 12572 bytes
SHA-256: 2625d7569ea81c91b71d52bb547f58e3f6a3089957cf2eb9fff4e8c3bf154d66

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