Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fa0346795af0c50…

MALICIOUS

PDF

82.6 KB Created: 2021-07-14 01:30:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: ca8384ae5846661b672b3bbdc4a5351a SHA-1: debfbd20b79125fadc6615db75066764521ab1cd SHA-256: 5fa0346795af0c508128b0269c531554e6640f9b8b66dbd0c8d39a46f20afe4b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, directing users to multiple external URLs, some of which are hosted on compromised WordPress sites. The presence of numerous links, including one with a 'utm_term' parameter suggesting a lure, points towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://infrive.ru/uplcv?utm_term=galaxy+attack+game+download PDF link annotation
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609f5fdb2f854---69392655538.pdfIn PDF document text
    • http://www.asslar.de/downloads/fokakisibekapegigel.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/57612d64ddf8507f646f7e57b97788ab/68902584865.pdfIn PDF document text
    • http://asokmontridental.com/userfiles/file/72118884574.pdfIn PDF document text
    • http://sanchariglobal.com/userfiles/file/mowuzero.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077828f990bd---80072813590.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/ebe03e6e0a4f5798b309c7d98f8d5430/detomowuxubipuvufuzobuz.pdfIn PDF document text
    • http://hasyo.net/files/file/8169994299.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/c6e7626118322a105e6b179539e9c3f4/80012915691.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/20f021dc086f00637b7de8f85a8346e3/kezagutukavadojekika.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/kezedokitewax.pdfIn PDF document text
    • https://bucatariizidite.ro/printuri-fi/files/losebow.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085568c48829---valawixexuruz.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d028d957ee---gorabulikepupazoj.pdfIn PDF document text
    • https://sunrise-photon.com/upfiles/editor/files/vuxagabevilexufisilusiri.pdfIn PDF document text
    • http://babamoleskine.com/files/file/37769234426.pdfIn PDF document text
    • https://citronixdeflection.com/nbloom/fckuploads/file/60130637600.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/21q2id21ed40fvpulbmmsvmcef/86039603908.pdfIn PDF document text
    • http://morgancountyoh.com/userimages/50669316609.pdfIn PDF document text
    • https://mosallaesf.ir/uploads/ck/files/nesamefevirukumep.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/temusedojaleva.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160aea58a067f6---patebozoboto.pdfIn PDF document text
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/9e0d5b9d3068fede24627db94c042a47/87358157021.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_off0000dd7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD7A 10784 bytes
SHA-256: d1e7cfdd7626f7acf9b38882d269ff80cc08460e5f0b4ce714d7af5dbdd452ec
font_01_sfnt_off0000f645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF645 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010e57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E57 17720 bytes
SHA-256: 9433ab840e173b69c736f4ef77ed63369e7aae4e7b57fe5590b32d8428029c17

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