Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fe2148db03927c1…

MALICIOUS

PDF

82.8 KB Created: 2021-09-12 16:21:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c2b889574129c2573f64cbf59637bb7d SHA-1: e26652b3fb3d4880286b715bd78690b3dd9af893 SHA-256: 1fe2148db03927c1bf84c80d19182b29f7509f22689c661042f4223660ab7c2c
126 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including ML classification and ClamAV, as malicious. It contains numerous embedded URLs pointing to a link farm, suggesting a phishing or SEO poisoning campaign. The primary purpose appears to be redirecting users to potentially malicious content hosted across many domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 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://nataliashishkina.com/userfiles/file/89419939277.pdf In PDF document text
    • http://eastcity.hu/ufiles/file/wazigujuk.pdfIn PDF document text
    • http://gelikonline.ru/content/Files/wobanuretexix.pdfIn PDF document text
    • http://geriatriccarenewjersey.com/userfiles/files/durikomivifewelag.pdfIn PDF document text
    • http://zvaracskaskola.eu/editor_uploads/system/files/36140320974.pdfIn PDF document text
    • http://xn--80aaaaadfwa5aftjhxrkcrg8iwc.xn--p1ai/pict/file/25003922422.pdfIn PDF document text
    • https://shastriratanchatterjee.com/ckfinder/userfiles/files/39230251033.pdfIn PDF document text
    • https://kildevangen.dk/files/kilil.pdfIn PDF document text
    • http://aj-freight.com/ckfinder/userfiles/files/74500224175.pdfIn PDF document text
    • https://emenu.hu/editor_up/10606353435.pdfIn PDF document text
    • https://nguyenhungstone.com/uploads/image/files/nifav.pdfIn PDF document text
    • http://oilmachineydy.com/d/files/73932173589.pdfIn PDF document text
    • https://activsport.ro/userfiles/file/lawekulijenapavel.pdfIn PDF document text
    • http://mwcapital.net/ckfinder/userfiles/files/xurozivopesufavidunowev.pdfIn PDF document text
    • http://yuanhebiotech.com/upload/files/44185657521.pdfIn PDF document text
    • https://pasifikendustriyel.com/userfiles/file/48469128406.pdfIn PDF document text
    • http://vibrobeton.by/pics/files/turareboxejuxofemikeket.pdfIn PDF document text
    • https://tspinstruments.com/cache/fck_files/file/98134731470.pdfIn PDF document text
    • http://asid.rw/userfiles/file/tuzugirelizawufarigek.pdfIn PDF document text
    • https://pima-alarms.eu/slicice/file/2456558549.pdfIn PDF document text
    • http://sevimticaret.net/userfiles/file/72224352664.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/pajikewup.pdfIn PDF document text
    • http://kesifveotesi.com/files/75297604011.pdfIn PDF document text
    • http://letsfinal.com/userfiles/file/91176063890.pdfIn PDF document text
    • http://vigen12.com/userfiles/file/tujav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=best+hot+movies+englishPDF 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_off0000de71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE71 18268 bytes
SHA-256: b203923b11ada76727d275227fcb9580bbb82247f73cf154f668e824eeafcf25
font_01_sfnt_off00010df6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001260d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1260D 10412 bytes
SHA-256: 4a6523260aee5d9044f1fac9034f7efe3eb49f0eefb43881d12eaa1ceaa23812

Open this report in the interactive analyzer, or submit your own file for analysis.