Malicious PDF — malware analysis report

Static analysis result for SHA-256 6064e43a665f9c79…

MALICIOUS

PDF

152.4 KB Created: 2021-06-26 18:38:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9d0d541e5490b67b391c15ddfb4acac1 SHA-1: bd0d8e40198af3858d0965bbfb43beb1c1eb42f8 SHA-256: 6064e43a665f9c79c88c4d7ac28e795848376674f1d3f24985cd9e2078caa743
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised CMS uploads and disposable hosting, designed to trick users into downloading further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely a phishing or trojan delivery mechanism. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://orgue-chantepie.info/FCKeditor/upload/file/63806849453.pdf In PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160940b1891601---29572743032.pdfIn PDF document text
    • http://harekatmemuru.com/images/Media/files/tedapidadunimodon.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/73ed3cf04ca40f5c255b0b8a88ece781/relifizezejisojule.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/5qd4ijvfknrtdeg7kskej89kn8/79374639466.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f17c972025---ditawubidalugajupen.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983bafc1dd4---lakojel.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160932c120f610---zitebugix.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609882ca48207---witelonabovutevu.pdfIn PDF document text
    • https://artlabjo.com/userfiles/file/48867470935.pdfIn PDF document text
    • https://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eab0155182---77972585900.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ebdf58763c---76668868958.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160800734c564d---3064786855.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/2da9b7c1b009f377333d08acc8540c48/37937827471.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d72f7313eb8---molese.pdfIn PDF document text
    • https://eurocomm-italia.com/file/80672660133.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/hk9qn7g3ip4b1qsvasun2mlinv/tilejododak.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/14a4c5b5d61eb8f21337d9e1707e0dcc/8597067955.pdfIn PDF document text
    • http://cainghienbinhduong.com/uploads/userfiles/file/78001204092.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1609478a683e2e---zesamobesezodewarozuwaxa.pdfIn PDF document text
    • http://mariopresto.pl/userfiles/file/jixiwapa.pdfIn PDF document text
    • http://artistalexanderkanevskywinnerinternationalaward.com/clientMedia/file/37732454554.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608512507736c---ronopitapolusibu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=themes+in+the+great+gatsby+chapter+1PDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001f545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F545 10924 bytes
SHA-256: 952fa52820bc161805c4da7b03bcd068c7f5654a7b2e5317468cad480a0197d2
font_01_sfnt_off00020e44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20E44 17692 bytes
SHA-256: 85b3c683b395b42a76ec403432b43230f63450761eeb8f7f5827b8cf44976e78
font_02_sfnt_off00023bca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23BCA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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