Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8bf83162dba8737…

MALICIOUS

PDF

74.2 KB Created: 2022-04-13 17:34:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-06
MD5: 605e252a342f8176fca45b7cb594c493 SHA-1: 63173758580b6cc4163d813b5f0a3034f6224249 SHA-256: a8bf83162dba8737c76d9f704f533ef8f56e009457cfbffb55418c4df84b92e7
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to disposable hosting or link farms, indicating a phishing or malware distribution attempt. The document body, while truncated, mentions appliance repair, suggesting a lure to entice users to click on these malicious links. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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
  • Travel-support phone-number stuffing scam critical SE_TRAVEL_SUPPORT_PHONE_SCAM
    Document repeats phone numbers in airline/travel/refund/support language, often across multiple regional phrasings. This matches SEO/support-scam PDFs that impersonate airlines or travel brands and route users to attacker-controlled call centers rather than a normal travel document.
  • 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://yoyep.co.za/YmrXLWy8?keyword=maytag%20neptune%20washer%20mah5500bww%20bearing%20replacement PDF link annotation
    • https://dunakanyarfesto.hu/ckfinder/userfiles/files/xifodonujesupozagujegab.pdfIn PDF document text
    • https://daxakowov.weebly.com/uploads/1/3/4/7/134704390/1800032.pdfIn PDF document text
    • https://angelsforwarriors.org/userfiles/files/wigejanejikob.pdfIn PDF document text
    • http://samnakthodrahassob.com/userfiles/file/tarulogozunak.pdfIn PDF document text
    • http://ebslang.net/_UploadFile/Images/file/jopozonuzugikizirekanezu.pdfIn PDF document text
    • https://varoslod.hu/kcfinder/upload/files/71098073869.pdfIn PDF document text
    • http://amanetauto.eu/kcfinder/upload/files/56311683754.pdfIn PDF document text
    • https://fosijegaden.weebly.com/uploads/1/3/4/8/134868146/tirawumiriki_rekebowi_sajobobumom_lonilumepev.pdfIn PDF document text
    • https://wazexusevawixi.weebly.com/uploads/1/3/0/7/130776334/wutife.pdfIn PDF document text
    • http://datacomsystems.cz/userfiles/file/18546687542.pdfIn PDF document text
    • http://gsemilia.it/userfiles/files/kemorejex.pdfIn PDF document text
    • https://aarhuskortet.dk/images/file/83193653822.pdfIn PDF document text
    • https://www.auto-ecole-acm.com/ckfinder/userfiles/files/69536514580.pdfIn PDF document text
    • http://rediger.vammenkro.dk/upload/files/87442936212.pdfIn PDF document text
    • https://tiselewo.weebly.com/uploads/1/3/1/6/131606631/mapulokelod-motifuloru.pdfIn PDF document text
    • http://dangkykinhdoanhkiengiang.com/upload/ck/files/lijeburavaxonujomijo.pdfIn PDF document text
    • https://zirubofab.weebly.com/uploads/1/4/1/2/141256605/mugopadev-xuraxe.pdfIn PDF document text
    • https://magicdiscoradio.com/userfiles/file/87062262862.pdfIn PDF document text
    • https://nyesigiso-mali.org/userfiles/file/pojajozipopuvixixej.pdfIn PDF document text
    • http://association-femmes-relais-aulnay.communication-pro.fr/public/1160/contenu/file/mixuwalez.pdfIn PDF document text
    • https://peketodofow.weebly.com/uploads/1/3/4/5/134589962/6f5d7b84e0c.pdfIn PDF document text
    • https://nuzaguwimera.weebly.com/uploads/1/3/4/4/134492670/tofodujig.pdfIn PDF document text
    • http://slovbau.sk/test/userfiles/file/dukafakekinidumigono.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://dejavu.sourceforge.netIn extracted file (font_00_sfnt_off0000bc48.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000bc48.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC48 11392 bytes
SHA-256: 80e3ba734bf162d54ebc0fa569cd85d3a8b5f01748a4c6621cb4f0d8d85478b1
font_01_sfnt_off0000d6dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eeee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEE 16552 bytes
SHA-256: 246102746f3bedd8ac4d49886883895e8c087a6a6bd86b12917e1ac1b0919aee