Malicious PDF — malware analysis report

Static analysis result for SHA-256 54464be0d3b569a0…

MALICIOUS

PDF

69.3 KB Created: 2021-09-18 09:53:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fe0b4af100322c6ae553ec4e699d2335 SHA-1: bcaf80e85156609192f7c5a5c6fa3cdce6d5299c SHA-256: 54464be0d3b569a02af09d8dae66363201a81e3e6b3cbca2e5d422ee1fc0857f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to disposable hosting, indicating a link farm designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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://pistant.ru/uplcv?utm_term=iptv+player+android+tv
    • https://www.medicalbi.com/ckfinder/userfiles/files/76587258561.pdf
    • http://studioagm.it/userfiles/files/16842310429.pdf
    • https://nirmalujjwal.com/public/ckfinder/userfiles/files/gidifusu.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/q1vf7ke9ujj2sdbgi1u2gcp5qa/bemeripavujasapefara.pdf
    • http://taxiluzern.ch/khurasan/userfiles/files/55305426932.pdf
    • https://www.huaikrachaohospital.go.th/assets/global/lib/ckfinder/userfiles/files/82623091032.pdf
    • https://novinfasteners.com/userfiles/file/81615003795.pdf
    • https://christianklein.eu/Quansis/ckfinder/userfiles/files/zofogor.pdf
    • https://smartmedia.ro/app/webroot/files/userfiles/files/34841472133.pdf
    • http://ladna.pl/user_images/file/11828564748.pdf
    • https://belitour.ir/basefile/belitourir/files/jelokilele.pdf
    • https://tybistanbul.org/resimler/files/61686442423.pdf
    • https://eko-briketes.lv/userfiles/files/kebaxenepogebivilopasotun.pdf
    • http://makinsushi.com/uploads/files/1167205209.pdf
    • http://www.moyekolodin.com/files/61912766780.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/575htr8a1oaco6v3pq93r5m057/98342972537.pdf
    • http://petgears.com/app/webroot/files/file/5799240630.pdf
    • http://tai-yang.tw/taiyang/upload/file/putureliposog.pdf
    • http://tantusmarina.com/UserFiles/file/85863373905.pdf
    • http://feminella.ro/upload/fck/jolobolitusut.pdf
    • http://thedewakohchang.com/image/upload/File/5027120268.pdf
    • http://quanhoangtsi.com/upload/quangtri/files/belora.pdf
    • https://eniedu.com/data/file/20210906190430.pdf
    • http://agppi99.pretty-match.com/upload/files/49864335261.pdf
    • http://termocity.by/pics/files/bawawunazebinaveliro.pdf
    • http://phucuongplus.com/upload/files/xogubusorifegenid.pdf
    • http://lisaarkin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/26561355944.pdf
    • http://maysoi.com/hinhanh_fckeditor/file/14290073353.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_off0000b394.bin
fc86a3ec363773b089c8858b30dae83bf74c372960b868262c479ad6768ce299		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB394 14480 bytes
font_01_sfnt_off0000d7ea.bin
b1e5c12aaba9ee6b26fd69a7647ae4f1a8f6296f9d6b9652f4a8e6ae707d9856		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7EA 10348 bytes
font_02_sfnt_off0000ef66.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF66 16792 bytes

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