Malicious PDF — malware analysis report

Static analysis result for SHA-256 91f28a5456527026…

MALICIOUS

PDF

97.9 KB Created: 2021-09-16 15:05:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ddf3e79bfc911487aceed075097f53bb SHA-1: d2ff98a4954d3d5e5229ee672173c5562107134f SHA-256: 91f28a54565270261f5006103e71f668e0a498181371403359109315fd43a3e6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, a common tactic for phishing or distributing further malware. The embedded URLs point to suspicious domains, reinforcing the phishing or malware distribution pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9875

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://oniceh.ru/uplcv?utm_term=podcast+app+apk PDF link annotation
    • https://projectmine.hu/ckfinder/userfiles/files/jatimajigerovega.pdfIn PDF document text
    • https://stijsr.com/userfiles/file/kejedufibaxifu.pdfIn PDF document text
    • https://pmcp-avac.com/files/upload-ckfinder/files/besijuv.pdfIn PDF document text
    • http://nitecoreromania.ro/files/file/24708883571.pdfIn PDF document text
    • http://somsit.com/ckfinder/userfiles/files/ledadezugipan.pdfIn PDF document text
    • http://mondoacquapiscine.com/userfiles/files/53692990939.pdfIn PDF document text
    • http://union.travel/ckfinder/userfiles/files/19215929564.pdfIn PDF document text
    • https://viettrungson.com/media/Files/23603392491.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ee0e7932a1---fufotavokufujazexuxu.pdfIn PDF document text
    • http://herve-coiffure.ci/files/94492299960.pdfIn PDF document text
    • http://twozonechickenlasvegas.com/uploads/files/86547140889.pdfIn PDF document text
    • http://www.dgtrans.co.th/login/ckfinder/userfiles/files/81160935205.pdfIn PDF document text
    • http://patriabrno.cz/userfiles/files/xofivowu.pdfIn PDF document text
    • http://tieulongcopro.com/luutru/files/24823626869.pdfIn PDF document text
    • https://greenlakecruises.com/ckfinder/userfiles/files/47374631526.pdfIn PDF document text
    • http://strahyi.ru/images/file/binikikajukajudepupajewi.pdfIn PDF document text
    • https://aokman-drive.com/d/files/90092308128.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/kudifesirewugumodej.pdfIn PDF document text
    • http://phukhoabacninh.com/images/files/naweruw.pdfIn PDF document text
    • https://activepymes.com/pub/file/54649641980.pdfIn PDF document text
    • http://labotinnghia.com/img/files/fagapulobefopupowubozalu.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/30954751086.pdfIn PDF document text
    • http://bonfiremadigan.com/uploads/fckeditor/file/20089444731.pdfIn PDF document text
    • http://farmina.ru/uploads/files/62737524584.pdfIn PDF document text
    • http://skogsformedling.se/bilder_umeny/File/jagakazifip.pdfIn PDF document text
    • https://bvphcn.bdata.vn/upload/files/75659662338.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_off000117f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001300b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1300B 10124 bytes
SHA-256: a0cc79c55033045d6243ed8500ade0da632143536516ee3bc4fc260eb8e21f47
font_02_sfnt_off000146d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146D8 19244 bytes
SHA-256: 061d7a7f7e4398630e1f66882f0e99fe6d6f0b2e7dbfa5d31d607521594163ab

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