Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea3f2c70e7a9b1c0…

MALICIOUS

PDF

82.1 KB Created: 2021-09-09 17:53:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dfd710ff0a209982046e7fc0ea16da9d SHA-1: faf841a8b7d1eff4e4659ba2ce12b0eebe18bf31 SHA-256: ea3f2c70e7a9b1c0c6b571d5527d54b1475a1c570cd70da71260a40ed40133c7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to potentially malicious domains, disguised as legitimate file downloads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://koltoztetes-szallitas-lomtalanitas.com/ckfinder/userfiles/files/surediwizewijibunafejiju.pdf
    • https://shiokuda2.com/contents/files/25310349319.pdf
    • http://sochi-riba.ru/ckfinder/userfiles/files/68059637430.pdf
    • http://bfttacg.marketsearching.com/upload/files/jovokasobujixepasefomega.pdf
    • https://sanvexe.vn/webroot/img/files/belixukum.pdf
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135f588d7746---30895764067.pdf
    • http://apnschool.in/singhania/downloads/file/40081504237.pdf
    • http://janaturismointegrato.com/uploads/file/56947051212.pdf
    • https://cristalparkhotel.com/ckfinder/userfiles/files/63341520604.pdf
    • https://mmgrowersg.com/ckfinder/userfiles/files/wogasiteluxomuxu.pdf
    • http://uitvaartverzorgingsindex.nl/images/uploads/zuveluz.pdf
    • https://kominove-centrum.cz/media/files/file/gisilezimetalutir.pdf
    • http://thongthien.vn/upload/files/14359343212.pdf
    • http://fasson.vip/images/editor/files/wipotaresasaj.pdf
    • https://khabul.mn/mmpa/userfiles/files/rafilefiseridiwerakuso.pdf
    • http://sochisushi.nl/survey/userfiles/files/40092399285.pdf
    • http://reginahajo.hu/_user/file/pewavexitonatinugu.pdf
    • http://amexeuro.com/an3_Uploads/file/48025520766.pdf
    • https://naveenent.com/administrator/imagetemp/file/41174754750.pdf
    • https://stka.gr/ckfinder/userfiles/files/dapanap.pdf
    • http://littlepearlbooks.in/data/eimages/file/44561061075.pdf
    • http://falconartistmanagement.com/ckfinder/userfiles/files/banubexexinuvol.pdf
    • http://residenceraffaellotorino.com/userfiles/files/fupojesare.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=little+book+of+common+sense+investing+free+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9fc.bin
ccd16069eeea2abdf58049f7249e15bed134375fc8668a658a772feda1a995da		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FC 11056 bytes
font_01_sfnt_off0000f343.bin
779acde3bda0e7ecfcff79cc31e817b73f5554b9dff7764b1ac86e73cbf313ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF343 18072 bytes
font_02_sfnt_off0001222b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1222B 16792 bytes

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