Malicious PDF — malware analysis report

Static analysis result for SHA-256 4889b8c344886cc3…

MALICIOUS

PDF

77.4 KB Created: 2021-09-16 11:10:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: eafd6447ad4bb7365d05fa2223c62e70 SHA-1: d590fa2a8cca67886f0d02ee966190fc14137b54 SHA-256: 4889b8c344886cc3b3d802619118512a25580cb49f5e4c03be776f16816545a7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable hosting, indicating a link farm designed to redirect users to potentially harmful sites. The 'wkhtmltopdf' authoring application suggests it may have been generated programmatically for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://allytemp.ru/uplcv?utm_term=what+does+stock+android+mean PDF link annotation
    • http://leeclinic.kr/userData/board/file/jibot.pdfIn PDF document text
    • https://baruipur.org/ckfinder/userfiles/files/6984695990.pdfIn PDF document text
    • https://www.frontiermea.com/sites/all/libraries/ckfinder/userfiles/files/73007437378.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/69701802066.pdfIn PDF document text
    • https://www.wappa.com.au/siteadmin/ckfinder/userfiles/files/75965284387.pdfIn PDF document text
    • https://tasivn.com/upload/ck/files/kejexemu.pdfIn PDF document text
    • http://bangkokmagnetwire.com/ecodev_test/image_system/files/40320868357.pdfIn PDF document text
    • https://dermatologie-francophone.com/userfiles/file/wamuzomigeguw.pdfIn PDF document text
    • https://monamifrance.com/FileData/ckfinder/files/20210906_B6066085FEE0D03C.pdfIn PDF document text
    • http://htwy.com/upload/file/peguso.pdfIn PDF document text
    • http://longruiglass.com/ckfinder/userfiles/files/20210913_081635.pdfIn PDF document text
    • http://location-venise.com/italie_documents/files/xalarigijovorewujimu.pdfIn PDF document text
    • https://eastmangroupllc.net/ckfinder/userfiles/files/44422556749.pdfIn PDF document text
    • http://dentalclinicbangalore.com/uploads/luxaduwikupigugogikoz.pdfIn PDF document text
    • https://letstravelforacause.com/miet/assets/files/43806232529.pdfIn PDF document text
    • https://canevastoilestjean.com/upload/editor/file/85179454429.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/18578548132.pdfIn PDF document text
    • http://whuntex.ru/userfiles/file/kegifuradekifinubeg.pdfIn PDF document text
    • https://temahr.hr/files/linivukozezidufobafiti.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/31b4d7d0abfe329c79a6977138822dec/48493663964.pdfIn PDF document text
    • https://markyatirim.com/resimler/files/2279957607.pdfIn PDF document text
    • http://dotykbylinky.sk/_subory/subory/wobureguravomanurajavoden.pdfIn PDF document text
    • http://crystaltrade.hu/data/file/32591262042.pdfIn PDF document text
    • http://douzonebnf.com/upload/file///junigitinakipaxudezurila.pdfIn PDF document text
    • http://cleangroupbd.com/ck/upload/files/lejunogavafavivazode.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_off0000c9b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e1cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CB 10676 bytes
SHA-256: 237b709d639b3531cfe1b243ab7f1675dd01489ec26dfc9e9d1fc5f790397ecb
font_02_sfnt_off0000fa1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1B 17712 bytes
SHA-256: 95e7bb7a394b3c45a7841a5a1ef016b4e42fea39ebab8d268772d336f8949280

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