Malicious PDF — malware analysis report

Static analysis result for SHA-256 02e74572532ad2ea…

MALICIOUS

PDF

78.2 KB Created: 2021-09-28 02:23:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 98aa7a31a4e4f899b0f9f680d122b968 SHA-1: 3ee59b80af4a09291d40168507cbe231563d768f SHA-256: 02e74572532ad2eafa6899f3b3df93043c45431753ca5e5b4298b468fc2062de
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised WordPress uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of URLs with 'utm_term=nordvpn+premium+account+apk' indicates a phishing or scam attempt related to software downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://chcial.ru/uplcv?utm_term=nordvpn+premium+account+apk PDF link annotation
    • http://xn----ftbkdcamitb5h.xn--p1acf/files/fck/file/luwuvifawarinixarekobemor.pdfIn PDF document text
    • http://gardens-spa.com/user_pict/file/41695347.pdfIn PDF document text
    • http://aptekarynek.pl/zdjecia/fck/file/zinusironigiwebimux.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161329fa66f7c1---71864870709.pdfIn PDF document text
    • http://unsersohn.com/images/file/47924091960.pdfIn PDF document text
    • http://saigondome.com/uploads/userfiles/file/jukepowuxobesovaladave.pdfIn PDF document text
    • http://dmhu.eu/uploads/uplib/file/xididopevijajo.pdfIn PDF document text
    • http://www.srijonihealinghome.com/fckimages/file/pidijo.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/tdri0o0jlm62cqjfassptj7rs3/80274785819.pdfIn PDF document text
    • http://xn--2e0b95unoa536adofm5h.com/userfiles/file/74415299018.pdfIn PDF document text
    • http://savytrading.com/userfiles/file/16625774192.pdfIn PDF document text
    • http://martonelektro.hu/files/file/butizisal.pdfIn PDF document text
    • http://aroma-es.red/yamituki-n/uploads/files/1457823469.pdfIn PDF document text
    • https://ketex.com/trcgp/ckfinder/userfiles/files/96979200442.pdfIn PDF document text
    • http://senseoftourism.dk/userfiles/file/42335217905.pdfIn PDF document text
    • http://wxeina.com/userfiles/files/85279485382.pdfIn PDF document text
    • https://tideandtigers.com/ckfinder/userfiles/files/50325760434.pdfIn PDF document text
    • https://projekt-lesen.de/userfiles/file/wukirofoxosora.pdfIn PDF document text
    • http://dierenwinkelindex.nl/images/uploads/20271877831.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131abc28e7b6---97257739642.pdfIn PDF document text
    • http://2013.letnifestiwal.pl/ckfinder/userfiles/files/peruvozifiwipetupim.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/457a3e83037b3ff83bdab5b9ed7401a8/vagujolujetob.pdfIn PDF document text
    • https://polymadeniyaglar.com/fckeditor/userfiles/file/88352824753.pdfIn PDF document text
    • http://gesundheit-im-blog.de/userfiles/file/61282341326.pdfIn PDF document text
    • https://etravelbox.com/scgtest/team-explore/uploads/files/komulepetiribuzimelujuli.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_off0000c56e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC56E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dd80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD80 19788 bytes
SHA-256: bae7d078a1bd0a1bb35530db54e7b00ab8300f677bc8ffa0c59d490531cb06d0
font_02_sfnt_off000110e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E5 10696 bytes
SHA-256: 60b7a59eb3a803f0b9c56beb30f2ba94df071daea3e349dbd304c8ce4690cfb5

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