Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d6f60aa8dae7182…

MALICIOUS

PDF

90.9 KB Created: 2021-09-10 23:04:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 60e47ed0c119fb2bc59872ca378ed7b0 SHA-1: 8d2180df20edfd0e65070841592709526810d916 SHA-256: 8d6f60aa8dae7182e03c6f1be3b4ac7887ff0a75c5f171b4366b143e61b353bd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to unknown or potentially malicious domains, suggesting a phishing or link-farming attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL distribution are consistent with techniques used to redirect users to malicious sites, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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://villamishkan.com/310renonew/front/images/files/56348089000.pdf In PDF document text
    • https://walnutcreekguide.com/wysiwygfiles/file/6028362196.pdfIn PDF document text
    • https://www.la-providence-ehpad.fr/ckfinder/userfiles/files/36999022293.pdfIn PDF document text
    • https://lenaoyunlar.com/calisma2/files/uploads/raxozawegelazofurip.pdfIn PDF document text
    • http://nwatchonline.info/userfiles/file/xipukowas.pdfIn PDF document text
    • https://suacuacuontoanphat.com/upload/files/sefumobo.pdfIn PDF document text
    • https://pointwebhost.com/calisma2/files/uploads/fojumabalamazurogupixas.pdfIn PDF document text
    • http://kxxbs.com/uploadfiles/file/a/30508034491.pdfIn PDF document text
    • http://escuelasfutbol8.com/docs/files/komizutavolibonefawide.pdfIn PDF document text
    • https://onlineadda.organicemall.com/ckfinder/userfiles/files/7180622514.pdfIn PDF document text
    • https://mlbcsimleague.com/ckfinder/userfiles/files/88387015450.pdfIn PDF document text
    • https://mayphoviet.com/media/ftp/file/99189552637.pdfIn PDF document text
    • http://aescantabria.es/upload/fckeditor/file///dijifuligifisuverinosejos.pdfIn PDF document text
    • https://supportsystemsvainc.com/home/ssvi/public_html/ckfinder/userfiles/files/34944573764.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210903051346_91715703.pdfIn PDF document text
    • http://tndgdemo2.com/ckfinder/userfiles/files/guzarogexaroler.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16136c439d312d---xosev.pdfIn PDF document text
    • http://inteko-tula.ru/f/file/zuwolixabepoleforumubi.pdfIn PDF document text
    • https://tessuno.com/upload/files/6130567a7f892.pdfIn PDF document text
    • https://codecs.ro/images/file/96486243764.pdfIn PDF document text
    • https://vantainoidia.vn/ci/userfiles/files/vaposudedusibopurofukep.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134d0585556b---72071387970.pdfIn PDF document text
    • https://majubesar.net/contents/files/lomuvufododigorizaz.pdfIn PDF document text
    • http://namthangbasaltstone.com/uploads/image/files/takakapakoditolasavi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=stickman+superhero+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF91 16148 bytes
SHA-256: b17e3c388ca520c70044df51a505a8c8de3d1ca9b2e495c629779bc8d31aca59
font_01_sfnt_off0000f521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF521 10860 bytes
SHA-256: cffb035661f6e2f4788d2bc2b860fec5b7da1047d248f6b03ae57e7610494d9b
font_02_sfnt_off00010e04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E04 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00012616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12616 20816 bytes
SHA-256: bdd6bcbbe68fd5a3db92c67db397343c79532240e947801623e43ccbce20b167