Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c43f2589d58dd45…

MALICIOUS

PDF

88.0 KB Created: 2021-07-25 13:41:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: afc3ac00350ce2c9ca9cc7b8b5e9cce1 SHA-1: 661fb07d9f82d1dd90f46c16df98c8b1e808ad5d SHA-256: 5c43f2589d58dd45b296ec14b865f2509dc3a00396cf5ddd213dffc5731f0c28
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS uploads or disposable domains. This suggests a phishing or SEO-based attack pattern designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 http://hasici-pristroje-eshop.cz/files/file/81701810968.pdf In PDF document text
    • http://abwva.com/uploads/files/bafetup.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160dce1cb270f2---51697078895.pdfIn PDF document text
    • https://giorgiosantinelli.it/file/30584026355.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c45fb771e27---fekomexuj.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c418c87a93bed97318abf8f5375efde6/xomovodogelipibivasofubiw.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/0111d18cecc1d27d403816aa3175cc66/jasepulagafepawunof.pdfIn PDF document text
    • https://jackyrouxmethode.com/userfiles/file/difujedudafi.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160c998e442a84---39694268403.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075445b92f32---fupod.pdfIn PDF document text
    • http://luberoff.com/userfiles/file/fubiguvax.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16079431c87a4b---32197333555.pdfIn PDF document text
    • https://leavingcare3plus.ch/userfiles/files/28317839930.pdfIn PDF document text
    • https://np21bellapalermoshopping.it/file/30154113076.pdfIn PDF document text
    • http://goneviaggi.com/themes/userfiles//files/21964842933.pdfIn PDF document text
    • https://tpk-m.ru/files/file/dokadatixadonivedon.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/0b810423264f091f9a0fdeff262e0f75/63839913316.pdfIn PDF document text
    • http://babamoleskine.com/files/file/jixodukavupitiragugi.pdfIn PDF document text
    • http://bertoniamministrazione.it/bertoni/public/file/61882892727.pdfIn PDF document text
    • https://francois-daulte.com/ckfinder/userfiles/files/xelezomubotukoxewosa.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/kufel.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087e996b93e7---zejalirugilonebaruxagawi.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f1c129b2ff5---mojisufitejaja.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160b7637790a64---bazubazoxafirosobozusipiv.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/u7kom3l2c70mr96nodhtfut3l2/86490702714.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608963a4e5e2c---vavitulusu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=pinoy+tagalog+movies+online+freePDF 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_off0000f5a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010dbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DBC 10736 bytes
SHA-256: c628e126c3858a7ed62037ea9308874372fbf7036eeab17f7185c52a7479ddaa
font_02_sfnt_off00012671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12671 16872 bytes
SHA-256: 520e06c2957eefdb183e78c1ca30b73e26e12ae05badac4e5a1cf4521a19e757

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