Malicious PDF — malware analysis report

Static analysis result for SHA-256 69294b9670e26821…

MALICIOUS

PDF

81.5 KB Created: 2021-03-14 01:22:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: b5fff7cf7d61f1dd8790cb7a91b26169 SHA-1: 3119d57263758440be9a8263c8c549cf70661d33 SHA-256: 69294b9670e26821fbd343bf2a1bc4dd37ddf6fdba8ef46406fb25a77ffc6f98
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a heuristic firing for a link farm and an embedded URI pointing to a suspicious domain, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to search engine optimization, likely intended to redirect users to malicious content.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://midufefew.ru/award?keyword=thyroid+gland+definition+pdf PDF link annotation
    • http://jusapp.club/toxic_wap_movies_20186uq8w.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/iCiaXQB/4853290027.pdfIn PDF document text
    • http://useraisins.pro/does_finland_have_the_best_education_system_in_the_worldd791i.pdfIn PDF document text
    • https://cdn.sqhk.co/wewutivuv/jdl5bib/soccer_star_shot_dead.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzosiboweja/uHihgd9/juwatojevujanuzuzibis.pdfIn PDF document text
    • https://cdn.sqhk.co/woxekivepi/70jihi6/digital_rechargeable_radio.pdfIn PDF document text
    • http://tublitalia.fun/phytochemical_screening_of_azadirachta_indicac3am4.pdfIn PDF document text
    • https://cdn.sqhk.co/gutinisiv/BOhi0Qw/satulerumexegemoma.pdfIn PDF document text
    • http://trenketo.buzz/icc_concrete_manual_2015vsx24.pdfIn PDF document text
    • https://cdn.sqhk.co/wixumenez/KAhaT8m/guess_the_netflix_series_2020_recomendadas.pdfIn PDF document text
    • http://maxist.ru/mebosijajepil9k89l.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/cMtibBJ/wordscapes_in_bloom_level_993.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/gifojuxaxeva/router_guide_bushing_harbor_freight.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/jesaxoxopilepogokiwoji.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/69028256246.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/92977640626.pdfIn PDF document text
    • https://d321836a-1bf8-47c4-b4d3-67fe1e7f0250.filesusr.com/ugd/33ab24_8ee8acc2af1d4482b56c02a56dfed176.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/steelers_injury_report_week_6.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/ocean_of_apk_drastic_emulator.pdfIn PDF document text
    • https://bc732cde-fb09-4fee-8ab5-c82a45a1131b.filesusr.com/ugd/2ac701_2c80da7839ad4421b641bf11f9739c62.pdf?index=trueIn PDF document text
    • https://4253c66a-660d-4c83-b31d-f715833d547b.filesusr.com/ugd/d9e9a0_3bc2180370a946029d1a366d439dfa81.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/vujazubejejamoxewapemawi.pdfIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/29139512591.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_off000101e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E1 5176 bytes
SHA-256: 5ef47006020f367cb0bcd44a5fa253071a76cab85fd59cd12222da532a706ee9
font_01_sfnt_off00011386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11386 10880 bytes
SHA-256: 69f08da7d476b915d8199568187245dfe052f66f1b28b628097ae4c58a422ea1

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