Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3a19fc590ee4fbe…

MALICIOUS

PDF

88.7 KB Created: 2021-09-19 22:31:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 3e07a1b44509f7701c7c0168370facdc SHA-1: 46332ef3e1e76eb31532f8559733770a79d5d04f SHA-256: e3a19fc590ee4fbeee45569e83ccb0cc16048cfb20aae9314bc0ec6d661d7e81
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URIs, with a medium-severity heuristic identifying one pointing directly to an IP address, which is a common tactic for phishing or malware delivery. The PDF is also described as a link farm on disposable hosting, further indicating malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://gulfb2b.com/userfiles/file/sebubivefuk.pdf In PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613c65599c86c---rufivazul.pdfIn PDF document text
    • http://mofrantech.com/userfiles/file/67532601924.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/68607438922.pdfIn PDF document text
    • http://htcable.cn/d/files/40045764675.pdfIn PDF document text
    • http://www.eatvirukai.lt/uploads/files/35581480726.pdfIn PDF document text
    • http://daechienglishpark.com/ckfinder/userfiles/files/8650578369.pdfIn PDF document text
    • https://araprinter.com/ckfinder/userfiles/files/17273376832.pdfIn PDF document text
    • https://listocrm.com/userfiles/files/78173723376.pdfIn PDF document text
    • http://emons-verlag.net/testarea/cwsCMSlight/media/files/pudirakisokat.pdfIn PDF document text
    • https://maytinhdalat.vn/images/uploads/files/70321368965.pdfIn PDF document text
    • http://lachambredechos.com/userfiles/file/69811516776.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fd35266a93---48370608714.pdfPDF link annotation
    • http://trevelci.ru/ckfinder/userfiles/files/1136126461.pdfIn PDF document text
    • https://endeligmandag.no/e-brev/data/div/tesoginuxogijereduvok.pdfIn PDF document text
    • http://abnigakgdsg.friendship-match.com/upload/files/11009878425.pdfIn PDF document text
    • http://gift-founder.com/archive/upload/files/motofokabimuvilasoxubajip.pdfIn PDF document text
    • https://braus.uz/images/shared/file/pixum.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613488af8c138---nineburimisesixajolo.pdfIn PDF document text
    • https://pakistanchristiancongress.org/userfiles/file/34357666188.pdfIn PDF document text
    • https://ewdel.cz/ckfinder/userfiles/files/ketulaga.pdfIn PDF document text
    • http://www.niziointerior.pl/upload/file/kigirivodotebex.pdfIn PDF document text
    • https://queensflower.nl/clientfiles/14395717945.pdfIn PDF document text
    • http://stainless-faucet.com/uploads/htmlupload/files/96420276640.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=game+kimetsu+no+yaiba+androidPDF 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_off0000f7d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010fe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE7 10848 bytes
SHA-256: 5b98437409210a6f9fa2be71981e3007cb23db3fbf858dee70695d01b5f1d878
font_02_sfnt_off000128fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128FB 16992 bytes
SHA-256: 41f1d09bb7ddcc22e5cd2d8d6d946d7392ab5e6f3793e9e710e0b3d449480ca8