Malicious PDF — malware analysis report

Static analysis result for SHA-256 acc30d37b8580892…

MALICIOUS

PDF

92.1 KB Created: 2021-07-03 12:55:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 214841a82df4719baf94645e360aff05 SHA-1: 531d5897a94d4fc9817a30ec892b48c38b39e02a SHA-256: acc30d37b8580892d6bf0f81070ddf150da3e16ad5b079c4b749566aba6f6e90
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of an advance-fee scam, with lures related to lotteries, prizes, and parcel delivery. While no scripts were explicitly extracted, the presence of numerous embedded URLs pointing to compromised websites and disposable hosting suggests a phishing or redirection mechanism. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/16090f0582c063---nesama.pdf
    • http://technoculture.cz/admin/upload/file/sujosomafaro.pdf
    • http://dzbnf.com/upload/file///warawevito.pdf
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d63e3ca75---zudapojexijazedujefi.pdf
    • http://m4klynchburg.org/clients/3/34/34420611de4c9c7593cf5e5fe12de6df/File/20716438329.pdf
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/a01cbb77946fc1416352ba09bed21270/pevuloreji.pdf
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/sp8i8ghm0v5bth9g8vhbcvq3l2/nimifodelusotibejo.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071acbade6fb---letokefulepumot.pdf
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/j06jmstc7k81151eea492jnj85/moforerupadejerisevisuk.pdf
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/ngotf3jmun62u2b9ug5ibhvm7l/38155445890.pdf
    • http://wisewood50th.com/clients/3/35/35ca2b70ae131fa39667c240906a3fe4/File/36314775599.pdf
    • http://macabrey-luthier.fr/data/Files/pelibefekaketisu.pdf
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/5ea29ed241200c176038f736d2ab2be9/tenilewogosof.pdf
    • http://www.prieteniitehnicii.ro/documente/file/fefumewozojegejuxif.pdf
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/kqcd3i7sush87g7d5fl4qpsemd/25348247454.pdf
    • https://carlojans.com/cms/file/tofalogobenonedipex.pdf
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b934733feda---62056758896.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16081589c7e510---zowofewogikime.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/6tt12evc23cn1fh1r2ia7plivd/sunamade.pdf
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/72d9d7be7359f1c2079a14503ae0c0e8/bikur.pdf
    • https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/voredexokukimad.pdf
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b09be665d8e---46468386626.pdf
    • http://bazis-expertiza.ru/ckfinder/core/connector/php/files/27533705440.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160a67635ddfa2---zomujajirexabo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=index+nifty+share+price
    • 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_off0001032b.bin
dd322182a5771dfee976695f3e7bd2e9449c7a1611b4c5ced1c9b5ed0de89471
pdf-font-stream PDF embedded font (sfnt) at offset 0x1032B 18456 bytes
font_01_sfnt_off000132d7.bin
8caa4df7fccf6601bf555c9e8d05a8a5b5b552deffc781cfac56e7ffd4ea1bdd
pdf-font-stream PDF embedded font (sfnt) at offset 0x132D7 10716 bytes
font_02_sfnt_off00014b70.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14B70 16792 bytes