Malicious PDF — malware analysis report

Static analysis result for SHA-256 354eb60eb92f1f0b…

MALICIOUS

PDF

80.6 KB Created: 2021-03-14 06:03:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b3d776a8eca8701d39e552335f07d803 SHA-1: 9227f7676afc5baa79d6578460fc300ab97b4b33 SHA-256: 354eb60eb92f1f0bae3d6ea1aef359e66ee179efc142fe6242bbca922ecff6eb
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://druttle.ru/wix?keyword=davao+city+national+high+school+uniform PDF link annotation
    • http://flathead.us/watercolor_artist_magazinejy3yx.pdfIn PDF document text
    • http://metazoaapc.fun/vodejixelikuttydo.pdfIn PDF document text
    • http://mmamba.ru/23092891076cyf0x.pdfIn PDF document text
    • http://tradebot.space/mitsubishi_lancer_1989_service_manualt1kch.pdfIn PDF document text
    • http://timelessdecorum.com/objective_soil_science_by_rameshjqkci.pdfIn PDF document text
    • http://topsale.pro/nespresso_lattissima_refillable_capsulesm94rq.pdfIn PDF document text
    • https://cdn.sqhk.co/sigidezok/4LngiJ5/kovenedudumelez.pdfIn PDF document text
    • https://cdn.sqhk.co/jiwosowo/b4fiZxq/automower_connect_home_assistant.pdfIn PDF document text
    • https://cdn.sqhk.co/gudopokobipa/jdKhhyS/merge_dragons_challenge_24_final_win.pdfIn PDF document text
    • http://vixegoxufareka.getenjoyment.net/giancoli_physics_for_scientists_and_engineers_3rd_edition.pdfIn PDF document text
    • http://pmaider.com/76548517690a6en1.pdfIn PDF document text
    • http://consequences.space/vatalunewuligamuzirodaxiyuc9r.pdfIn PDF document text
    • http://physcoo.com/vejugopaniwomulezeferofos1w9gm.pdfIn PDF document text
    • https://cdn.sqhk.co/nepelusir/eidPjij/lizunosow.pdfIn PDF document text
    • https://cdn.sqhk.co/jobubexivex/e6Thghi/fox_racing_riding_gear_combo.pdfIn PDF document text
    • http://vijofudevadotar.mywebcommunity.org/cancer_de_pancreas_endocrino_y_exocrino.pdfIn PDF document text
    • https://cdn.sqhk.co/mosepoxik/dHRdSVT/buy_living_room_furniture_in_ghana.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/sirilagewuga/11025075400.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/how_to_find_the_cross_sectional_area_of_a_hexagonal_prism.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/28568560927.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_off0000fcf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF5 5456 bytes
SHA-256: 70d583a546ea37b3a3392e06878b4aea8cf86af7d7b4929b693525cd3c740aec
font_01_sfnt_off00010f72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F72 11024 bytes
SHA-256: 012db635a69c3e380a54316aa557412060b43e4ad7aaff83caa79ddee87119eb

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