Malicious PDF — malware analysis report

Static analysis result for SHA-256 314127877fd08cf8…

MALICIOUS

PDF

73.8 KB Created: 2021-09-11 20:15:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5a98f05e97218dc05c3c02eb43c97422 SHA-1: 14993f611d1adf1f746ca744b2c4ba03e6fa2deb SHA-256: 314127877fd08cf86273b690a69fc99b3cd3851c14173aa33b3f6a8a9aec559e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to obscure the true malicious destination. The presence of a download button lure further supports a phishing or malware distribution attempt.

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://visualmotion.nl/uploads/file/93393670279.pdf In PDF document text
    • http://loveperfectionschool.com/upload/file/vifadojibuwurogigonelis.pdfIn PDF document text
    • https://nstoplana.rs/ckfinder/userfiles/files/sawodinesemorudafotiw.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1613211c5d1783---5181037032.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/kituxobabizodojemanevoram.pdfIn PDF document text
    • https://www.sophrologue-nimes.fr/upload/news/files/kimolesoboraximelope.pdfIn PDF document text
    • http://beta-rc.com/upload/files/65185559438.pdfIn PDF document text
    • https://sapsda.org/SapmaUserfiles/file/6293098631.pdfIn PDF document text
    • http://www.pranabkumar.com/fckimages/file/26096318975.pdfIn PDF document text
    • http://amongelite.com/ci/userfiles/files/bovitimupinexizes.pdfIn PDF document text
    • https://paymentor.nl/uploads/file/2280386302.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613588ee208c7---mibomopawokefasatux.pdfIn PDF document text
    • http://andreuma.madteam.net/ckfinder/userfiles/files/wepabezoniwede.pdfIn PDF document text
    • https://mvmdigital.gr/files/files/92616362209.pdfIn PDF document text
    • http://probeg2000.ru/files/userfiles/files/zirodakemopajilojile.pdfIn PDF document text
    • https://nepalipublisher.com/ckfinder/userfiles/files/darupodepurelanabekivoxup.pdfIn PDF document text
    • http://goldia.cz/data/file/82868390366.pdfIn PDF document text
    • http://tongchangkj.com/uploadfile/file///2021090619504844.pdfIn PDF document text
    • http://vervesimuhub.com/userfiles/file/zipebesidul.pdfIn PDF document text
    • http://cerritos.songhakbbq.com/uploads/files/najozetawijumozix.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/saranazuravedetu.pdfIn PDF document text
    • https://millinerandassoc.com/files/file/fijiramoruva.pdfIn PDF document text
    • http://iowatriallawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/72619239039.pdfIn PDF document text
    • http://premiumdrinks.eu/userfiles/vavolujowubikirogepo.pdfIn PDF document text
    • http://finemetal-cn.com/upload/files/49875311643.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=mp3+to+mp3+converter+apkPDF 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_off0000bfcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFCF 15988 bytes
SHA-256: c54dcd86ba1fe01bbe3d28d8eac2ffc25e6eecab1942681ce7c7ad20dde9a8cc
font_01_sfnt_off0000e92d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10144 10552 bytes
SHA-256: 5a33c6d52c9a1861511e2a6272c898ac51e496a0536238855611e9c7e0a48e6a