Malicious PDF — malware analysis report

Static analysis result for SHA-256 954b496e40d534de…

MALICIOUS

PDF

76.5 KB Created: 2021-09-12 05:07:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ad0e4a212d06a1eeebb5c88d03cc3ca4 SHA-1: f19bda22f3e4738efb2a134e89c86126b09528f8 SHA-256: 954b496e40d534dea11ab9520535412fb1acaea3c4578d3a73fe1f1e4fe59847
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. It contains numerous external links, many pointing to disposable domains, characteristic of a link farm used to obscure the final malicious destination. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest a phishing or malware distribution attempt.

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://pilot-nav.com/ckfinder/userfiles/files/28660846331.pdf In PDF document text
    • http://opusbiz.kr/data/editor/file/1978715108613ada6e3bd11.pdfIn PDF document text
    • http://argol-editions.fr/userfiles/file/13477356525.pdfIn PDF document text
    • http://caythuocdangian.net/images/files/polenuxovagifimo.pdfIn PDF document text
    • http://thietbikhachsanvinhhung1.com/upload/files/40576569551.pdfIn PDF document text
    • http://ttccid.com/userfiles/file/dibuweri.pdfIn PDF document text
    • http://quaint-house.com/images/blog/file/99468768208.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/1613ca7ca330cc---vawigupevupuledoz.pdfIn PDF document text
    • https://bdata.vn/upload/files/13147858678.pdfIn PDF document text
    • http://sumisaedu.com/FileData/ckfinder/files/20210912_18FE796ACA3327CA.pdfIn PDF document text
    • https://willmarareachamber.com/ckfinder/userfiles/files/12087511823.pdfIn PDF document text
    • https://brigitte-farner.ch/userfiles/files/pejadofo.pdfIn PDF document text
    • https://ldoris.com/upfile/files/20210905102707.pdfIn PDF document text
    • http://furniture83.com/upload/files/puzebipetilagigonezifime.pdfIn PDF document text
    • http://autoscuolemontagna.it/userfiles/files/88926346552.pdfIn PDF document text
    • http://mexvp.com/ckfinder/userfiles/files/denuxipuvadamitizarelobin.pdfIn PDF document text
    • https://artedelvalle.cl/gal/files/file/vigobutijiligidegatojobe.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133cfd82655b---28090865206.pdfIn PDF document text
    • http://apisicul.com/userfiles/files/lomebewobugokosobilekez.pdfIn PDF document text
    • https://viboot.traigiongthuha.com/ckfinder/userfiles/files/fuvuwekepuluwopuxudi.pdfIn PDF document text
    • http://fujieshubao.com/zk/UploadFile/file/2021090921355673499.pdfIn PDF document text
    • http://ty-int.com/files/files/85511390947.pdfIn PDF document text
    • https://biographiewerkstatt-singer.de/userfiles/file/77555842502.pdfIn PDF document text
    • https://limblength-sldf.com/userfiles/file/833065855.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=linli+tv+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_off0000c6c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6C7 9840 bytes
SHA-256: b01d5d5ebd722f5b51d6f49ac3e9a9661ac920801a457e31e9af4c20f33869a9
font_01_sfnt_off0000dc6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC6E 18596 bytes
SHA-256: 22d2dc7971fa4f4a0cb0d56dfe4b3a6c2e6caeb779b03ef26e83d050ed1017d0
font_02_sfnt_off00010c35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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