Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f208d174be146ea…

MALICIOUS

PDF

89.3 KB Created: 2021-06-27 18:22:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 89544debc611b1e09a2a7f6197237658 SHA-1: 1c335b7fcf960f817ca7b7f1ff01e13cc6a3115a SHA-256: 2f208d174be146eadf766dfd213d14c145d9a6015c62ac08bc286208c04216f4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 http://espacioschillout.es/images/admin/file/kakatibej.pdf
    • http://fujiya-la.com/uploads/files/kiterite.pdf
    • http://cosmic-kino.ru/sadm_files/88426050654.pdf
    • http://asiadomainstore.com/userfiles/file/fixopa.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/612c03f0a9a695ee1efa9bd4d9b2becd/51828696289.pdf
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/ggv9b5ht3ev95c7enjgebr7bfv/jirajilotibiguvuw.pdf
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609fcd372da75---22287051753.pdf
    • http://xn--80age2amlc.xn--80adxhks/pics/images/file/40314000625.pdf
    • http://abwingsbuffalo.com/uploads/files/51865353336.pdf
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3b4f912aeb---siriwudumakisofevu.pdf
    • https://badoza.net/userfiles/file/bowerixenosufovirevoto.pdf
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ae8aaf3cb2f---puladon.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160941c8411621---dejarudewom.pdf
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160be15745ef51---pademema.pdf
    • http://ahchala.com/img/file/21206237175.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/5b647b1367ce7a4a59741b2139b62ebf/91398187775.pdf
    • http://nesthomes.in/userfiles/file/zapowoxorij.pdf
    • http://nordicaluminium.ru/userfiles/file/bekuwewibexig.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/388d5192b2d3fe4aeb048de45da4bc27/61655394454.pdf
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/0530821d51c16c4613e22446d55551a1/66322454140.pdf
    • https://htchninc.com/d/files/naxemilig.pdf
    • https://pensiunea-escape.ro/ckfinder/userfiles/files/makaposip.pdf
    • http://www.serenissimaservizi.com//files/fuxatusen.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=papules+acne+on+forehead
    • 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_off0000facf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFACF 16792 bytes
font_01_sfnt_off000112e1.bin
ff64ef0e4babbee99fd2fbf39bd501833b19df102fc75a851b233ccc899616a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x112E1 17292 bytes
font_02_sfnt_off00014016.bin
04324585ca7bb4dc585b7edca84a86e89d6c89fcbafdeb8a7e08abd3435a6b63
pdf-font-stream PDF embedded font (sfnt) at offset 0x14016 10628 bytes