Malicious PDF — malware analysis report

Static analysis result for SHA-256 d077ded90a03c13d…

MALICIOUS

PDF

77.5 KB Created: 2021-06-18 11:03:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5f14683abc99c3e31ec9aa0b31223be SHA-1: d61c5f306d4f7db0c212bb58793a0f8d92fdc626 SHA-256: d077ded90a03c13d9dae933bf8db15dfe261f933939fb23f96147f3a1870afc0
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, so the rationale is based on the URL heuristics and AV detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607209e8ee97f---lexalozirawa.pdf
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a86c402948---mezojajijomenatatup.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160816866076ea---51963129198.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1d2e8fbca---xewazodoxamubapofivodenux.pdf
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/1rfsuq83l0k9frv2j1kl1qvnll/mawovaz.pdf
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/gkutfgncr309smla221alehoir/61093224757.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16087b8d7cea74---26571091089.pdf
    • https://fullmagicweekend.com/ckfinder/userfiles/files/zeruvubepesexubisorizuxu.pdf
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/e2f2dc6db08d4d088d1eedaf0dd0f872/7576610173.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b700da6f6a---64934871120.pdf
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985f2c4adf2---42961401488.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608bda03ea3d9---tiwoxasik.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cba03c7eb44f232fcbea404af738cd8a/zariloradolajik.pdf
    • https://manenshop.com/upload/files/pabizoxamexapenow.pdf
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/1c0194367930da72f149ec3f57c73eb4/naxobozotopugo.pdf
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160823fe74394a---lagadosewevofozi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=physics+and+software+engineering
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/dd22327229959b16a1f8da985447d4be/4852488007.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efcc.bin
dbefe238097fe7b5973804836aa2579c9dfe19e99a402f03cc57d7e89fca5689
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCC 5448 bytes
font_01_sfnt_off0001026a.bin
b83b2af2dd6b1db43bae18c82795bcdf722d7ba5b7012ddb277130f40ff65f93
pdf-font-stream PDF embedded font (sfnt) at offset 0x1026A 10840 bytes