Malicious PDF — malware analysis report

Static analysis result for SHA-256 afd1d05cf57aeedf…

MALICIOUS

PDF

83.7 KB Created: 2021-09-09 03:04:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e20fd36672ba6f465ea39cfa8bead099 SHA-1: 9ae3e95495e5d3d56374860c180725a720cdcbf6 SHA-256: afd1d05cf57aeedf48f6c5ed69690d849ad2fb9dc7b01ea47366782c79212166
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's designed to redirect users to potentially harmful websites. The presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution scheme, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://archism.ru/uplcv?utm_term=bloxburg+80k+mansion PDF link annotation
    • http://strandedtattoo.com/file/77222637887.pdfIn PDF document text
    • https://mimpishio1bet.net/contents/files/61100251026.pdfIn PDF document text
    • https://www.sophrologue-nimes.fr/upload/news/files/xogideninutovo.pdfIn PDF document text
    • https://fasleh.net/Files/files/39478264984.pdfIn PDF document text
    • http://rem-proekt.com/f/file/74297725168.pdfIn PDF document text
    • https://philly.drinkpoint.com/uploads/files/netewote.pdfIn PDF document text
    • http://idrogastermoclima.it/Utentifile/FCKPage/file/97563496716.pdfIn PDF document text
    • https://loffoxfitness.mvwebsolution.com/userfiles/files/zopof.pdfIn PDF document text
    • http://verzorgingsindex.nl/images/uploads/36250855827.pdfIn PDF document text
    • https://santehsevast.ru/userfiles/files/82242047863.pdfIn PDF document text
    • http://centralcogtc.com/uploads/file/56120316330.pdfIn PDF document text
    • https://briljant-maleri.se/UserFiles/files/67052284804.pdfIn PDF document text
    • http://crystal-lamp.ru/uploads/files/tiwaje.pdfIn PDF document text
    • https://fereshtegan.net/basefile/fereshtegannet/files/35246149916.pdfIn PDF document text
    • http://zh-huaxun.com/uploadfiles/files/51928289107.pdfIn PDF document text
    • https://www.scmsgroup.org/ckfinder/userfiles/files/27408897371.pdfIn PDF document text
    • https://skvely-kup.cz/files/file/44617409499.pdfIn PDF document text
    • http://factblogs.com/uploaded_files/userfiles/files/34587688164.pdfIn PDF document text
    • http://zae.me/datafiles/file/lebazezotuduwolemobinu.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612f46755a641---vavur.pdfIn PDF document text
    • https://optimustelecoms.com/ckfinder/userfiles/files/fotomole.pdfIn PDF document text
    • http://newmob.it/userfiles/files/vogisabitokumezelizelotu.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/43374133869.pdfIn PDF document text
    • https://luxurybaths.marblobaths.ph/app/webroot/img/files/masejitudenavis.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_off0000e0e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E3 18164 bytes
SHA-256: 5a758d6a058ca92db3c57cd82f6901f6e32186b033a6f188f7d1da4a24a946ee
font_01_sfnt_off00010fe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE2 11040 bytes
SHA-256: 10184c79aca4c7680696b579bbb876347eca4542591c38e93bb3c603c0188deb
font_02_sfnt_off00012990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12990 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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