Malicious PDF — malware analysis report

Static analysis result for SHA-256 1193d7977f45301c…

MALICIOUS

PDF

83.2 KB Created: 2021-09-13 10:20:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 8b7daa2bf17d391fe4902120f604bde3 SHA-1: 5548222e154beb95c2ba55a1790446e71095397a SHA-256: 1193d7977f45301c7700bdae09c93f052228e6247a65907374aea5b719975482
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs, many of which point to disposable domains and are likely part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan delivery mechanism. No scripts were extracted, but the presence of many external links suggests a phishing or redirection attack.

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 https://nomylo.ru/uplcv?utm_term=load+android+app+on+phone PDF link annotation
    • http://viprealestatebrokers.com/userfiles/files/dazib.pdfIn PDF document text
    • http://chiangmai-clean.com/user_img/files/66309382145.pdfIn PDF document text
    • https://a1-recruitment.fr/v2011/Files/fck_upload/file/fojikaku.pdfIn PDF document text
    • http://phamtrangia.site/upload/files/disijivomowexo.pdfIn PDF document text
    • http://lt101shop.com/userfiles/files/55643080760.pdfIn PDF document text
    • http://redondoclassicburger.com/uploads/files/xaridolenituk.pdfIn PDF document text
    • http://market-oborudovanie.ru/upload/file/30441596237.pdfIn PDF document text
    • http://ugrctrani.it/userfiles/files/refotorutujilonum.pdfIn PDF document text
    • http://suchanekstomatolog.pl/files/file/jiwes.pdfIn PDF document text
    • http://sbsedupatti.com/sbsedupatti/userfiles/file/56649981071.pdfIn PDF document text
    • http://duef.ru/public/file/vuvuta.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/62675473135.pdfIn PDF document text
    • https://butchercurnow.com/img/shop/contents/roxevomegedesezadadutis.pdfIn PDF document text
    • http://onmamtour.com/FileData/ckfinder/files/20210913_9B1327894A5DAF32.pdfIn PDF document text
    • https://media-get.ru/userfiles/files/tubevudegejekasafez.pdfIn PDF document text
    • http://antonio-pelella.eu/userfiles/files/fofalebugufoxaxigisiwe.pdfIn PDF document text
    • https://hotelindigha.com/FCKeditor/file/98307835087.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/16138e1a57f6fb---84501590598.pdfIn PDF document text
    • http://windowsplusllc.com/ckfinder/userfiles/files/35676626286.pdfIn PDF document text
    • http://cu-mbc.com/ckfinder/userfiles/files/dejane.pdfIn PDF document text
    • http://gemwishrs.com/ckfinder/stones/files/64256891927.pdfIn PDF document text
    • https://greenbins.ca/ckfinder/userfiles/files/nidafaxaxewin.pdfIn PDF document text
    • http://ilkconstruction.com/Images/Media/files/sutigavad.pdfIn PDF document text
    • http://baikalspring.ru/ckfinder/userfiles/files/57899438693.pdfIn PDF document text
    • http://abogadosaguilar.com/ckfinder/userfiles/files/rukuzemiteguri.pdfIn PDF document text
    • 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_off0000e275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE275 10136 bytes
SHA-256: 0fc665606da2674ebd5c62fdc6abe3e71c34c40f1e48d7fd49575adf5aa51ec1
font_01_sfnt_off0000f8e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E1 17724 bytes
SHA-256: 5217da6863007c1149178149ca771faa7e1cfd97e74fc40ba9759627f4cce357
font_02_sfnt_off000126fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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