Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba70e68e63d20d45…

MALICIOUS

PDF

90.4 KB Created: 2021-08-07 08:33:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ef0109d2dff513d23c122398522ef9ae SHA-1: bddeadcfb027a68e64d17266161c529931070956 SHA-256: ba70e68e63d20d45003b0faf0e461e844ae6d9c8f53ea5424195d52fa6b135b3
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and a link farm pointing to various domains, many of which appear to be compromised or disposable hosting. The presence of 'utm_term' parameters suggests an attempt to disguise the true nature of the links and potentially lure users into downloading files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://irlanc.ru/uplcv?utm_term=minecraft+dungeons+apk+download+android PDF link annotation
    • https://chp-travel.ir/data/file/dipibimeninepegox.pdfIn PDF document text
    • http://eca.or.th/ckfinder/userfiles/files/mepinimejukowubazadeloji.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/7m4mt1asm7bvf1adhta3i64e8k/vatedagipo.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/wusenunovoke.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0dd17b7b1---taxeruwojurubedinemitaj.pdfIn PDF document text
    • http://macap.nl/app/webroot/files/userfiles/files/teveb.pdfIn PDF document text
    • http://nova-auto.com/upload/paxamakagix.pdfIn PDF document text
    • https://itacademyindia.com/ckfinder/userfiles/files/xozitokiker.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/i1ooe5097kaqipj73g0d5lt166/saziperabijizuzosu.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b3e6f26f8---pedifakiwovaxu.pdfIn PDF document text
    • http://dtcguild.org/clients/80367/File/51013415671.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6d1f1d00c---xeboritiwurorafaw.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e6e0b5fda4---51958937012.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/50422849949.pdfIn PDF document text
    • https://costabravas.com/uploads/localidades/files/jometebabugo.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/ac48d1d5d942f4a783c2758279fdde1c/324793938.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/3pd85r1l1qhrr3te8h70ckg7oi/ruzobenu.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5f3f3b3bf6---birelodobamufowijaf.pdfIn PDF document text
    • http://purifoy2020.com/clients/1/11/118d8b7ee1ea4bab8fb19da95c56260f/File/89009069163.pdfIn PDF document text
    • https://alusol-kw.com/ckfinder/userfiles/files/turiwidapupupum.pdfIn PDF document text
    • https://phuketwebstudio.com/ckfinder/userfiles/files/30925641276.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/dowavevutegirexiw.pdfIn PDF document text
    • http://olimpic.hu/ckfinder/userfiles/files/newetev.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfb92eb5268---muxev.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_off0000fc07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC07 11068 bytes
SHA-256: adbafb29432a99f3bd72d9cee3b107f96abf8af580a5e5124f36fc3dd6d674b3
font_01_sfnt_off000115cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115CD 17628 bytes
SHA-256: c2d71c1553a2d940d4eb1efcc9af9741973c6b1631759b92febf687637a7a9fc
font_02_sfnt_off000143d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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