Malicious PDF — malware analysis report

Static analysis result for SHA-256 78abcb57578b0504…

MALICIOUS

PDF

77.4 KB Created: 2021-03-31 14:52:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3821721a5ae911ceffd5c3112293e33b SHA-1: ddbf6b2c92b2e34c0650eb7d21a4b4082490f8de SHA-256: 78abcb57578b05041039271e82392b23656e924665cbd4a5a568a91169dd91a9
126 Risk Score

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-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://xajibur.ru/wix?keyword=introduction+to+networks+companion+guide+v6+pdf+free PDF link annotation
    • https://cdn.sqhk.co/jerivudofin/je0ZAgh/wadakerixawijulavuvono.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://luminar4-download.xyz/plantronics_cs510_pairing700b2.pdfIn PDF document text
    • http://youtube-subscribes.com/re_edit_text_in_paintc3qdu.pdfIn PDF document text
    • http://begemotiks.fun/punjabi_songs_lyrics_video_download_for_whatsapp_statusd25ke.pdfIn PDF document text
    • http://gagarinski.su/cyberpunk_2077_ps4_pro_performanceql9qt.pdfIn PDF document text
    • http://copyrightsupporteds.com/2240129618yecyn.pdfIn PDF document text
    • http://clipshd.design/33288345346x92eh.pdfIn PDF document text
    • https://cdn.sqhk.co/datimemovuko/ulmWhfb/pumelivod.pdfIn PDF document text
    • https://cdn.sqhk.co/nigalasiline/ojgxfZw/empire_building_mobile_games.pdfIn PDF document text
    • https://cdn.sqhk.co/sodelaranu/MhiWQGD/fighter_jet_pc_games_2018.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/27874274683.pdfIn PDF document text
    • https://113c517c-d7b0-4b36-99d7-6722bcb7ef36.filesusr.com/ugd/8e66a5_43112e44c6e44a3987b8c13182591ece.pdf?index=trueIn PDF document text
    • https://cb47f074-0476-4434-b381-5672a365cab8.filesusr.com/ugd/c46c8a_7ee9ea563cf54f32b809a63980b0bcea.pdf?index=trueIn PDF document text
    • https://4ac36a2f-1533-488b-b282-cf34cdace458.filesusr.com/ugd/bcfc12_66d77c44559643f09f5926480aaf0135.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/12366381898.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/zazowonowasaruj.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/masters_in_building_information_modelling_uk.pdfIn PDF document text
    • https://52ed6390-a5c1-4502-9f93-599cf6d98ad1.filesusr.com/ugd/f7fbc8_9153c88e1b2343e3825fd837277e1427.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC86 5748 bytes
SHA-256: f4bd498440af245d354cd8efc9907e3bc36660445b6f8675483c8eb5134b836e
font_01_sfnt_off00010022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10022 11696 bytes
SHA-256: 2f6047db4a0d7b07dceadaeb9f9e6a67c5e78478c9b890a1558aa06a618bbad0

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