Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f3962eac570ac53…

MALICIOUS

PDF

74.5 KB Created: 2021-09-01 10:01:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7ae2533b3b1ba42757018614590b9f40 SHA-1: 26b77c317b0c5cf04594eb862dab33438120cafd SHA-256: 2f3962eac570ac5318496410964086598b62b83698695b3c1817db56de23ef8d
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 phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised websites and disposable domains. These links are likely intended to lure users into downloading further malware or submitting sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9907

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://huntic.ru/uplcv?utm_term=30+days+to+a+more+powerful+vocabulary+free+pdf
    • http://aroma-es.red/yamituki-n/uploads/files/kabunixabeguxafukoz.pdf
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160e8130c1e618---47712488625.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/9a3a14bf06be06329d7ec964ce27b30b/kanurataxigunalolebiju.pdf
    • http://ymy-tea.tw/upload/files/xijukezabiwemedolaxo.pdf
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/3vkv1kvk1puunhbnqnisijsnd2/jenaxugapez.pdf
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8da0c067d7---86508647.pdf
    • http://clinicaveterinariagoitese.it/userfiles/files/98072433929.pdf
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5287b4755---73358701321.pdf
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/cae40499341470e4bc0b3936f78de91a/49877010333.pdf
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1606e2aabccf67---80786923534.pdf
    • http://federicozucchettiarchitetto.eu/userfiles/files/ledefiruxujasakuvizefe.pdf
    • http://marta-galan.com/files/varios/file/pabufo.pdf
    • http://ebsenglish.net/_UploadFile/Images/file/ralofadizaladufurezi.pdf
    • http://hodori247.com/uploads/files/50487097239.pdf
    • http://goldenpeak.it/userfiles/files/8198709122.pdf
    • http://cy2hand.com/userfiles/gataboxu.pdf
    • https://tkquiz.com/userfiles/file/66376944582.pdf
    • https://meesens.be/KrMee/Tekstverwerker/82720032137.pdf
    • http://naturallabs.fr/userfiles/file/vugefe.pdf
    • https://childconcern.in/trila/userfiles/file/71286478455.pdf
    • https://maintogelonline2.org/contents//files/rodumoxanetuf.pdf
    • http://datev.hu/ckfinder/userfiles/files/76897059381.pdf
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/bbbf5a0192d71c7658db791758c98294/fugikafurej.pdf
    • http://thanuyentea.com/ckfinder/userfiles/files/72721481859.pdf
    • http://www.europesolidaire.eu/userfiles/files/jivizukuzumodu.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf88b8f004---33533163872.pdf
    • http://angelojrobles.com/admin_initial_test/userfiles/file/18693797635.pdf
    • 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_off0000be98.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xBE98 16792 bytes
font_01_sfnt_off0000d6aa.bin
b908d47edff42ac47af5b62eb09477f1f836fe6689be306bd39f99cc7380d63b
pdf-font-stream PDF embedded font (sfnt) at offset 0xD6AA 16516 bytes
font_02_sfnt_off0001012c.bin
24082f89a2ce0f0f76cd3fe0b76f5a443ff269b2348a1ed6ec444ee1fd3eacb2
pdf-font-stream PDF embedded font (sfnt) at offset 0x1012C 11288 bytes