Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c95f5a2ad5a2bac…

MALICIOUS

PDF

79.1 KB Created: 2021-07-24 04:45:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1ed54236176c35be8c29936b70d7aee0 SHA-1: 710745010747fc36f6c6057d40757d7673e32b88 SHA-256: 1c95f5a2ad5a2bac9727da93c2dae92f6289932f1232ecbf5740131582d99595
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The ML classifier and ClamAV both strongly indicate this PDF is malicious, specifically flagged as phishing or a trojan. The document contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised WordPress sites or disposable hosting, suggesting an attempt to distribute malicious content or phish users. No scripts were extracted, but the structure and URL patterns are consistent with malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://carparts-fixture.com/file/file/85873103372.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087bac88a32a---gurikojilarajesupavobet.pdf
    • http://frutapac.com/ckfinder/userfiles/files/tijinolanuwobini.pdf
    • http://botosani.ro/img/uploads/file/24675881697.pdf
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3585e32697---56942470365.pdf
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160712a797287f---nekedatazukiwinavuvawujo.pdf
    • http://kisito.com/userfiles/file/40198711251.pdf
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/slkq9smrlu8vvrdc0323mkipm6/35713737168.pdf
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160cd69266447a---mefipuzetolususididaxezo.pdf
    • http://gemculture.com/userfiles/file/medotenimu.pdf
    • https://ferdavagnar.is/images/fck/file/wejupajipojelogax.pdf
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/f792ca21208a7856d24be50b2bdc6c4b/73713314840.pdf
    • http://mikomisushiwc.com/uploads/files/6914769404.pdf
    • http://bukhatirhomes.com/userfiles/file/zofumawovoxesezupu.pdf
    • https://lee-trading.tw/archive/upload/files/92041996257.pdf
    • https://xn----8sbcehyodmtf1czh.xn--p1ai/userfiles/file/41783241975.pdf
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070874ebba5d---77494213665.pdf
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609236e5b1327---78464835298.pdf
    • http://synowka.pl/galeria/file/nifisekazuje.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c209ee87b1b---wakamixubujanonu.pdf
    • http://anhbanglaw.com/userfiles/file/gafijudoredewojakoxi.pdf
    • http://rungrawin-itt.com/userfiles/files/61320989091.pdf
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/ca084dcadf6f6522f72cc3490d5554a5/vepinije.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=achyutam+keshavam+rama+narayanam+bhajan+mp3+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ceda.bin
20630e48e29f31ff436c0c9b23149d0b1293d71d5e1e3edd31793f3dde590ca8
pdf-font-stream PDF embedded font (sfnt) at offset 0xCEDA 11568 bytes
font_01_sfnt_off0000ea19.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA19 16792 bytes
font_02_sfnt_off0001022b.bin
a731cb71c5f7affd2cc58260e499c162b997536d73296ec7868fad9b9a9928ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x1022B 16696 bytes