Malicious PDF — malware analysis report

Static analysis result for SHA-256 012783210c30a767…

MALICIOUS

PDF

81.2 KB Created: 2021-09-16 19:49:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6fa7e25fddcc58dda852440f20c74678 SHA-1: 4eb7c4490419df2e64096ed46fed4446313820d6 SHA-256: 012783210c30a767a3241d9541bbbe3007395bcab0a50a7b92c82bddfd22c5fb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which are on disposable hosting and appear to be part of a link farm. The primary URL suggests a lure for downloading software, indicating a potential phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://krisoc.ru/uplcv?utm_term=pubg+mobile+download+latest+version+obb PDF link annotation
    • http://nsdadventist.org/FCKData/file/saxikafafajowevakis.pdfIn PDF document text
    • https://ibliberia.com/ckfinder/userfiles/files/61961626114.pdfIn PDF document text
    • http://studioturina.com/userfiles/files/28085782253.pdfIn PDF document text
    • http://whipitleather.com/userfiles/file/tudajajilebevoli.pdfIn PDF document text
    • http://altera.ukrstroyka.com/content/xuploadimages/file/84479936361.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/5986956769.pdfIn PDF document text
    • http://ets-sptk.ru/pic/file/58042859813.pdfIn PDF document text
    • https://abzesolar.com/uploads/files/vorokabepofuga.pdfIn PDF document text
    • http://pro-elec.ru/ckfinder/userfiles/files/liditebezek.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613e21440aec2---80759059700.pdfIn PDF document text
    • http://novichiha.ru/pic/file/24539788348.pdfIn PDF document text
    • http://nyitotthaz.hu/userfiles/files/67688346899.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/bda16a39be6e8508b7f51972ab392a88/fogepu.pdfIn PDF document text
    • http://tchid.net/userfiles/file/26209682620.pdfIn PDF document text
    • http://cancercareresearch.com/userfiles/file/guxejiz.pdfIn PDF document text
    • https://palezieux.com/ckfinder/userfiles/files/basimosasaruneluxutitewu.pdfIn PDF document text
    • http://ndc-group.ru/uploads/files/zixunijisiwu.pdfIn PDF document text
    • https://yukkumpulgroup1.com/contents/files/sogeb.pdfIn PDF document text
    • http://psychanalyste-gard.fr/ckfinder/userfiles/files/fukowizukos.pdfIn PDF document text
    • http://gsemilia.it/userfiles/files/zotemonojomadegu.pdfIn PDF document text
    • http://superbarter.sk/media/file/nelodupat.pdfIn PDF document text
    • http://drivingtesttips.ie/fckeditor/userfiles/file/42631782371.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_off0000d75f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD75F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF76 10984 bytes
SHA-256: 6e9badafbb4fe64e17da8a6bc98c8d8fc1ea7a2d43d1837f28b680aeb74704df
font_02_sfnt_off000108c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C6 17764 bytes
SHA-256: d2cdb0e15ca61aefb793f418408bf734e7931646e9c25cb937586cef93ae5a08

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