Malicious PDF — malware analysis report

Static analysis result for SHA-256 348a689fa65438da…

MALICIOUS

PDF

86.0 KB Created: 2021-07-08 12:59:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5b3645d98cbea7184092bd603c085cc0 SHA-1: a52f208ac64885241eb46abf9cfa35252dc62610 SHA-256: 348a689fa65438da040194eccdd00e93442f5cd18f17b7794f11868bc9ffefd4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to lead users to malicious content. The presence of external URIs and link farms on potentially disposable hosting indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/suioldhap87rb5ond8blohpiin/virekedikagiv.pdf
    • https://szabobuszrendeles.hu/files/files/luvokunexozew.pdf
    • http://statsale.com/data/upload/ck/files/daditiwuxokikode.pdf
    • https://pasarantogelsatu.com/contents//files/59389644776.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ba2f358537c---nexive.pdf
    • http://carefirstwalkathon.com/clients/8/89/89514deb4c0e8807eb046cac28c4977f/File/buwofamosapezajomole.pdf
    • https://aneri12.eu/res/file/dilinalomidititinulak.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/7vq6br7o6qbn5oddtic6cln9u1/mivuxefulebi.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609a1c77143cd---tetawifulep.pdf
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/92ee8dc14b7bcf8c9e67412a2df28896/lalose.pdf
    • http://jacksonreunion.org/clients/71346/File/jaruwokezeborakig.pdf
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160baf4fa49fa3---24252525568.pdf
    • http://haumeaonline.com/userfiles/file/96915339475.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/16082b52c13851---96110313917.pdf
    • http://condosworld.com/abisol1/userfiles/files/35744218921.pdf
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/175779d3a72d14374a79b8c288f0dc83/tejitebobojofo.pdf
    • https://lose-weight.tw/upload/files/dabanalokikaxitexukir.pdf
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b163b74c1f4---tapopivajirapezoduxuvigad.pdf
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/8ci9plf00cpt91f6mobo22d48s/23230917962.pdf
    • http://sciattella.net/images/file/55212410490.pdf
    • http://www.jindatunnel.com/up_files/file/57752309079.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/16088df7ba5266---sapamujudu.pdf
    • http://gancza.pl/userfiles/file/patepijigewedugerovex.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=another+word+for+strong+leadership
    • 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_off0000ec1a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1A 16792 bytes
font_01_sfnt_off00010431.bin
97abcb0f0a0dab259d2283b18922a3b2a7a9adf827bff1ed00b7f8f565d085b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x10431 10844 bytes
font_02_sfnt_off00011d07.bin
e785c36319958914ea9dd56c8f664ad7cfd0e39dbdc92ae5b755a6f420af041a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D07 17532 bytes