Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd7a37be056e40a0…

MALICIOUS

PDF

75.4 KB Created: 2021-09-25 06:08:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 3dddd0b8d0b3cbd559afba1e25c1598c SHA-1: 69aad279df97ffa679bd840c0198a865a3090e88 SHA-256: bd7a37be056e40a011b928f25324334e7b3d14b42c199cda3c1273e3ed076d7e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that likely lead to further malicious content or phishing pages, disguised as game download links. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may also be used to instruct users on how to access a password-protected archive, a common tactic to bypass gateway security.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://garglob.ru/uplcv?utm_term=download+pokemon+pearl+for+android PDF link annotation
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/aa53b6f946c3b615f3c8f437def38504/gogag.pdfIn PDF document text
    • http://kamienneogrody.com/userfiles/file/47077218066.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143dd7166f89---32874074625.pdfIn PDF document text
    • https://rts-wm.com/ckfinder/userfiles/files/porexeralodefum.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/b8a257e965128ef0a5d2ce696cb807df/96121046331.pdfIn PDF document text
    • http://hoangnamjsc.com/upload/files/57932987802.pdfIn PDF document text
    • https://s-h.cc/uploads/files/202109021736432249.pdfIn PDF document text
    • http://sowa-architekci.pl/userfiles/files/ladinozanaxizobonixinil.pdfIn PDF document text
    • http://e-park.es/img/uploads/files/zuvobaripum.pdfIn PDF document text
    • http://energo-winstal.pl/userfiles/file/15394669031.pdfIn PDF document text
    • http://elitvorota.ru/f/file/lomegunekaxejoxawep.pdfIn PDF document text
    • https://chulintemple.org/CKEdit/upload/files/96381781491.pdfIn PDF document text
    • http://peak-experience-europe.com/images/blog/file/55662310006.pdfIn PDF document text
    • http://hykylalumni.org/userfiles/14885943014.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148f1086b16f---nubofexezukomulixed.pdfIn PDF document text
    • http://ueros.fr/admin/ckfinder/userfiles/files/juwakinozepaza.pdfIn PDF document text
    • http://zerosquareonline.com/file/61315979659.pdfIn PDF document text
    • http://moutierrozeille.fr/userfiles/file/muleponi.pdfIn PDF document text
    • https://kabelkyaobuv.sk/editor_uploads/files/vopetujezabosawipemip.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-9-9/20210909140546971686.pdfIn PDF document text
    • http://saint-florentin.charcutier-traiteur.fr/ckfinder/userfiles/files/30183938608.pdfIn PDF document text
    • http://gaudi.tw/upload/file/67696477567.pdfIn PDF document text
    • http://erex.hu/upload/file/ruvonufifetiwurovawidun.pdfIn PDF document text
    • https://millinerandassoc.com/files/file/sovosobabenejug.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_off0000c048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC048 10572 bytes
SHA-256: fa334f963514a2dd9ffc13ebadebee4772a56a2f4ff0780a5e749cfd8d786471
font_01_sfnt_off0000d853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD853 18512 bytes
SHA-256: 08b0af3cffa85009aba0db8127a2eb222add78e6b7fe63f48e142c57a1ee8799
font_02_sfnt_off000107e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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