Malicious PDF — malware analysis report

Static analysis result for SHA-256 edf5e769b3d61f24…

MALICIOUS

PDF

78.5 KB Created: 2021-04-04 19:18:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: eaeb2007b61504ea23431e5da3d05d5a SHA-1: b39e4fb32a31b598f92fce0c842eb2b141cb6a8e SHA-256: edf5e769b3d61f243dae3898af1ff1c27d12dd831df0adbcd7e5378eb75854af
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 0.9990

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/strik?utm_term=what+are+some+personal+fitness+goals PDF link annotation
    • https://cdn.sqhk.co/wakewafo/fZCyILx/ketisononepozekofifeta.pdfIn PDF document text
    • https://cdn.sqhk.co/jixuvepabu/JmbjiZW/qr_code_scanner_for_android_mobile.pdfIn PDF document text
    • http://devazabekodum.iblogger.org/good_food_guide_hanoi.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizufofuj/gihgfhh/14716076706.pdfIn PDF document text
    • https://cdn.sqhk.co/lexebogefaj/gcasZrZ/fukeranunigujaso.pdfIn PDF document text
    • https://cdn.sqhk.co/pobopuwubox/higeEic/sonny_liston_adopted_son_daniel.pdfIn PDF document text
    • https://cdn.sqhk.co/kapokosop/egdFBgd/karaniveki.pdfIn PDF document text
    • https://cdn.sqhk.co/pelemobi/gjdidFL/866400641.pdfIn PDF document text
    • https://cdn.sqhk.co/pabefidinaz/eEhihek/zofurujurax.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/Fggjjjh/grow_empire_rome_cheats_apk.pdfIn PDF document text
    • http://madoxorijegobe.sportsontheweb.net/38836606823.pdfIn PDF document text
    • https://cdn.sqhk.co/talidapato/cieJhbm/umc_quick_care_nellis_and_charleston.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/setikizo/59244583082.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbec1ddb-016b-497e-89dc-f1075a19dae8/jixogamijituvok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e2b330b-3bd5-4c37-811a-dcf8a66f585b/89529287876.pdfIn PDF document text
    • http://sajatuvireguta.atwebpages.com/70768690198.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/46345020719.pdfIn PDF document text
    • https://s3.amazonaws.com/fusopoxipo/save_game_burnout_3_takedown_ps2.pdfIn PDF document text
    • http://bekusisit.atwebpages.com/california_cooperage_hot_tub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed223a2c-6bfa-45f2-8a96-6e42cb57b61e/67762181688.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/30486759948.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f119460-1e8c-4db7-8e66-771345478a7a/72252858605.pdfIn PDF document text
    • http://xemenorusameker.epizy.com/97832214755.pdfIn PDF document text
    • http://lupewozer.rf.gd/jowixigeposuboza.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_off0000e6ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6EA 5116 bytes
SHA-256: 77911d95dd9419b999af02537dae17183ada88b9416f26d457416001913f288d
font_01_sfnt_off0000f831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF831 11308 bytes
SHA-256: d12701a0bc7c5efa5603a52136d38e7adfba6e6a5370d9dff76f9e7cfb2b17f5
font_02_sfnt_off00011e53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E53 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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