Malicious PDF — malware analysis report

Static analysis result for SHA-256 9498fca5d533dc63…

MALICIOUS

PDF

101.8 KB Created: 2021-10-11 14:58:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 0bbb23c972cd078e25119baf4f670c5c SHA-1: a4b2f5b3ed248e0b1542ce6b2d64dc9672ce2169 SHA-256: 9498fca5d533dc631aa57be1a7bc852fd2c3a26025d95a5b6a40714c44579674
126 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. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed to host multiple links on disposable domains, a common tactic for phishing or malware distribution. While no scripts were explicitly extracted, the presence of numerous unknown URLs suggests the document's primary function is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9867

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 http://kccmaul.com/files/files/sutixomatafoxerolajejifit.pdf In PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161480e3127d0b---70393266779.pdfIn PDF document text
    • https://postelezmasivu-olomouc.cz/ckfinder/userfiles/files/vezubewizemoxejo.pdfIn PDF document text
    • http://architettipassarinmarzotto.com/userfiles/files/boneberijajamubebizaja.pdfIn PDF document text
    • http://onthebroadway.com/CPD/adminpanel/upload/file/56317455655.pdfIn PDF document text
    • https://pasationtravellers.com/root/FCKeditor/file/kuxow.pdfIn PDF document text
    • http://omni-links-europe.com/images/blog/file/47471511105.pdfIn PDF document text
    • https://dgssu.com/upfolder/e/files/20210903130707.pdfIn PDF document text
    • http://md-servicios.com/userfiles/file/vikamovetepis.pdfIn PDF document text
    • https://rmp-familienanzeigen.de/cms/files/lojukinikepekuwan.pdfIn PDF document text
    • http://daliangluyinpeng.com/userfiles/file/pamoponegebirabivamuki.pdfIn PDF document text
    • http://ssaisarang.com/ckfinder/userfiles/files/desimusipefirubafuxize.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/tojupowizemamupetu.pdfIn PDF document text
    • https://bipalisdemo.dashindonesia.com/userfiles/files/85816262591.pdfIn PDF document text
    • http://uniquecharacters.com/upload/files/jotaritufo.pdfIn PDF document text
    • http://csc0731.com/userfiles/file/20211005154658_hog1li.pdfIn PDF document text
    • http://aktifmedya.com/dosyalar/files/felade.pdfIn PDF document text
    • http://bingsu.ir/cache/fck_files/file/63639153812.pdfIn PDF document text
    • http://wajl.net/img/file/2021918214521.pdfIn PDF document text
    • http://stoewebdesign.no/userfiles/file/gokuvipixo.pdfIn PDF document text
    • http://networkinglikepro.com/ckfinder/userfiles/files/mijotonalevilalusokokaj.pdfIn PDF document text
    • http://www.recko.ru/ckfinder/userfiles/files/32681848753.pdfIn PDF document text
    • http://milkexim.ru/imgeditor/file/jufulanusaj.pdfIn PDF document text
    • https://eventaipei.com/upload/files/luluselemigaxupis.pdfIn PDF document text
    • http://piemonteforyou.it/userfiles/file/14111123264.pdfIn PDF document text
    • http://ksklinika.ru/ckfinder/userfiles/files/14297282730.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-9-14/20210914082851106197.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/2I9n2o-U8HI/uplcv?utm_term=oak+mountain+state+park+camping+mapPDF 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_off0001229a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1229A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013ab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AB1 10888 bytes
SHA-256: 482b893a49a9109efe33c7e21b1b58d18f9dc4f9fdc8cf257aa6c300f55b6ba2
font_02_sfnt_off000153ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153ED 20876 bytes
SHA-256: 32d754da26fd6f90c82e1f1dfab030f7c6623a77c64e6e12f3efba7a5836912a