Malicious PDF — malware analysis report

Static analysis result for SHA-256 b47ab663193a162a…

MALICIOUS

PDF

92.9 KB Created: 2021-07-16 03:42:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 10529f9835ddbbbc481aad5dbd6171d2 SHA-1: 207551ceda8ce6185ebd1add903310b9631eda3d SHA-256: b47ab663193a162a3fbe8d45df9989397ddcd1a40fde3895cc236004135eb328
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing multiple links to external websites, some of which are hosted on compromised WordPress installations or disposable domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded URLs and the nature of the heuristics suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609101c65138d---gololorupekuxoj.pdf
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/fa40ef4754423c3dee4481c5a0b52094/43957268410.pdf
    • http://nicolalazzarotto.com/userfiles/files/fedevazeteludegujawove.pdf
    • http://cesishotel.com/res/wysiwyg/file/zizejugorimadavodofa.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b0b39d977---35184063736.pdf
    • http://lookkorea.net/userfiles/file/pomosidebekenemof.pdf
    • http://mulherinscampground.com/clients/879992/File/jegaguje.pdf
    • https://vnsteeldetailing.com/UserFiles/files/mopuputavu.pdf
    • http://157.230.241.115/image/upload/File/15636816057.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1606fec4997d74---37157126056.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4d2f57ad8---fofaxofebafotiza.pdf
    • https://bursakaynak.net/userfiles/file/69374544425.pdf
    • http://bsp-plovdiv.org/ckfinder/userfiles/files/12746753913.pdf
    • http://rld-carbon.ru/file/65784402743.pdf
    • http://driver-jazda.pl/upload/file/nekukelap.pdf
    • http://bilmatbasim.com/userfiles/file/wanejawirilojutudo.pdf
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/6888f8c767d7bc5a514f0bccea873891/wutimunokamisatekodo.pdf
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160875e144124e---jaguvapu.pdf
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b435c20fb0c---kaserojale.pdf
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/iubr7s01sgbhlj2st07mvpdou1/xiwotufujebimo.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cadc8667887---xozuladanaxotiresigazazu.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/4q79esgnis4fj835k4t6k0r8j1/91691781573.pdf
    • http://learnazia.com/fck/imagesfile/lufufepesubimeguk.pdf
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7c79575fc---fixovuguwegu.pdf
    • http://lncxjzxxw.com/upload_fck/file/2021-5-21/20210521073003123997.pdf
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160889b012b63f---gixafebuzafuno.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=the+promises+of+god+are+yes+and+amen+niv
    • 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_off00010865.bin
50d572e3709391050847279c721cda7ea8f709906e0897bfbd2038b293a8cfe0
pdf-font-stream PDF embedded font (sfnt) at offset 0x10865 17092 bytes
font_01_sfnt_off000134cb.bin
d9af2494c0e7442f6dc46e004a9eeed1486cd4cb676ba0167c14ee5fc0e15749
pdf-font-stream PDF embedded font (sfnt) at offset 0x134CB 10944 bytes
font_02_sfnt_off00014dcf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14DCF 16792 bytes