Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a9c079b267a04fe…

MALICIOUS

PDF

102.9 KB Created: 2021-08-08 09:42:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 673d26e087e772babd4150c3878cc87f SHA-1: 5955204c5b7f7a140d700e39fe9834d70c8d5897 SHA-256: 1a9c079b267a04fee17bdad3723fb8bd8ed10336bb023a5e20f22f14fad7b716
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to lure users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 6

  • 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 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 https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607de33d89a3f---27629990963.pdf In PDF document text
    • https://burstallconrad.com/editor_files/file/3452438478.pdfIn PDF document text
    • http://taskentcompany.com/userfiles/file/77364582198.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/ad69546c0b14cd69d82af71cd6198301/medesalazi.pdfIn PDF document text
    • http://kartywspomnien.pl/uploads/assets/file/73801290621.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/212bf4483e49f3e55e98fd57a87b6878/saboxezil.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757fb912d41---57620306631.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/vefanax.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc92172797e---bovodepozepomewarutozajer.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c382d613e13---madado.pdfIn PDF document text
    • https://olympicwroclaw.pl/zdjecia/fck/file/97514700530.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c402e22f40b---53747963210.pdfIn PDF document text
    • http://musikpark-live.de/userfiles/file/98973384659.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bc00365855d---gepowogonunigido.pdfIn PDF document text
    • http://cphs1970.net/clients/877309/File/33883499135.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afe81aea15c---futematuluvuwefubap.pdfIn PDF document text
    • https://haysalon.com/public_html/userfiles/file/watemakim.pdfIn PDF document text
    • https://kaemsp.org/upload/editor/file/lazatig.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fab583c58b---kavopafilufasipaneguted.pdfIn PDF document text
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/ik3ut8mvqp5otu2d5uf06cvhoe/kemotisas.pdfIn PDF document text
    • http://chretkinia.pl/userfiles/file/xebajesijijagudawekaloru.pdfIn PDF document text
    • https://n-zvuk.ru/upload/file/sofot.pdfIn PDF document text
    • http://aydinservis.com/ckfinder/userfiles/files/97518943596.pdfIn PDF document text
    • http://hotelrefah4ter.ir/basefile/hotelrefah4terir/files/44820480078.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/5fl5c3hc8jl4rrsoip8ug6v734/43842013914.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=exercices+angles+adjacents+5%C3%A8mePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F71 11096 bytes
SHA-256: 8472896c558a0110cc2df49239b32a1e93a05355ef9a9c1550d5d2bf0a4a46ac
font_01_sfnt_off000128d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000140e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140E2 16092 bytes
SHA-256: 73ec6210c49bcdb493ce2668dd25b2adf91a0a7ce2ff08f73ffec585307e78c1
font_03_sfnt_off00015619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15619 20692 bytes
SHA-256: 881d37cac2e89a22811ec977e6e0f77a4349edb02cd11e4f1301d6d0287425bf