Malicious PDF — malware analysis report

Static analysis result for SHA-256 692050160e0dd503…

MALICIOUS

PDF

86.3 KB Created: 2021-09-18 09:53:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 904a824d3cc93c1dc29efb46db785ddf SHA-1: 9234cec6a93d1363b4b08cc8ec33b15e464aed57 SHA-256: 692050160e0dd503c420f5e289674faa9ab1ae6c7236a1a02466dea0448f4248
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. The PDF contains numerous embedded URLs pointing to various domains, and one heuristic specifically identifies it as a link farm on disposable hosting. While no scripts were extracted, the presence of many external URIs suggests the document is designed to redirect users to potentially harmful websites, likely for phishing or malware distribution.

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://huntic.ru/uplcv?utm_term=how+to+change+my+voice+during+call+on+android PDF link annotation
    • https://middletonchambers.com/ckfinder/userfiles/files/bagapozekekidopa.pdfIn PDF document text
    • http://er-trans.com/img/produkty/files/95680124059.pdfIn PDF document text
    • http://leton.pl/userfiles/file/fisopejezejugumoxene.pdfIn PDF document text
    • http://fiumaradelsossio.it/userfiles/files/jiledolexufamop.pdfIn PDF document text
    • http://xn--oy2b9bv81anouola.com/upload/file/202109132054407858.pdfIn PDF document text
    • http://www.likoda.com.tw/upload/ckimg/files/zamilideguwinojimido.pdfIn PDF document text
    • http://pacemakerpressintl.com/uploads/assets/file/50077418075.pdfIn PDF document text
    • http://mu-rrrc.com/userfiles/file/jamedanavudepejadekedi.pdfIn PDF document text
    • https://12shio1.com/contents/files/86393831810.pdfIn PDF document text
    • http://vertex-decor.com/userfiles/file/50849058251.pdfIn PDF document text
    • https://mimpi1pusat.com/contents/files/76300669093.pdfIn PDF document text
    • https://driftwoodcc.com/userfiles/files/tofivigakerimesepoxonige.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139c7c615fb3---24831678073.pdfIn PDF document text
    • http://gesht.ru/admin/ckfinder/userfiles/files/37684923532.pdfIn PDF document text
    • http://psychanalyste-gard.fr/ckfinder/userfiles/files/92179373294.pdfIn PDF document text
    • http://robertoantoniz.com/resources/original/file/vizubi.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb573e3343---baketutapibaxalizineteki.pdfIn PDF document text
    • https://praktijk-fix.nl/userfiles/image/file/88038446658.pdfIn PDF document text
    • https://creativitagh.com/pevron/www/img/file/wefiwitutiga.pdfIn PDF document text
    • http://vit-physio.de/file/55001226991.pdfIn PDF document text
    • http://tdbm.vn/upload/files/63439140737.pdfIn PDF document text
    • http://fermobkorea.com/userfiles/file/20210908131415.pdfIn PDF document text
    • https://7mark3t2-7aya.com/contents/files/tuzafolab.pdfIn PDF document text
    • http://stellar-toys.com/ckfinder/userfiles/files/vevasope.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/noxaxalowinedip.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_off0000eb72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB72 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10384 17736 bytes
SHA-256: e6d41dd0555a294f2aeb9efa0c99065f592aecc21d6d58491d57b3e63e5c6c7d
font_02_sfnt_off0001317d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1317D 11008 bytes
SHA-256: 2440acc1909e2624c52f0aa8af97580f6e48d0bf90c88a3798a6b0058711d6bd