Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c06dfcc845db5aa…

MALICIOUS

PDF

75.0 KB Created: 2021-06-29 22:21:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 93dde6802b8f10502f9665aec2425682 SHA-1: a2f64250c10b2bb0a9622054aed602151752724a SHA-256: 7c06dfcc845db5aac8613ff7050d52c282f82c870786b194b4967ed1a5598778
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The PDF's structure and embedded URLs indicate it's designed to redirect users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 http://www.adarshvidhyasankul.org/userfilesfile/fugidazawukeluruwurugig.pdf
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/5i5l5v7kgbsg6sgjijkc34lvjk/xurekojowewowipigew.pdf
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160742ba8dad6e---rukufuvixepovotuwu.pdf
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1607caa6a9fd39---julusiwotolovugeriwote.pdf
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608bce0c3a8b9---46958723286.pdf
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/ac97f6522a548f12ed488241d6f57acb/lisifafupajupadivaw.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607665a364f6e---kuxuzidufalebob.pdf
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa2721c6ccf---sutifojunonojazeb.pdf
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/6b3c13804dbd5a5890ecbe6eb13144ab/jegaxesolexo.pdf
    • http://dakmet.pl/upload/xijozujerezudebifokiwoxaj.pdf
    • http://kalikraft.com/images/file/5774790837.pdf
    • http://fullcolorspandoeken.nl/userfiles/file/zutufifaxonusa.pdf
    • http://alfavit.tv/userfiles/file/30925100288.pdf
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/hm32t1gd0br2eealnv370dj64f/8170031351.pdf
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/vup0b687un9551ld95v0oim724/41891788097.pdf
    • http://sbox-technology.com/upload/datoteke/8120857904.pdf
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6faa743edc---16806640744.pdf
    • http://rexant.by/upload/editor/files/wogotoxasaposivipajixifa.pdf
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160ba683f0d6ad---tavagap.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/cmi64s7r601t30vc6ta552f3bm/duwatowale.pdf
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/nggp3qlpn25otc3aqkkq26d0qs/88245589243.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=how+many+cups+in+one+and+a+half+quarts
    • 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_off0000c302.bin
2520358fc370da693e71d3a2dd01ce6fb722bc9b5208326e98c3866f88f9ad7f
pdf-font-stream PDF embedded font (sfnt) at offset 0xC302 11324 bytes
font_01_sfnt_off0000dd3e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3E 16792 bytes
font_02_sfnt_off0000f550.bin
a92c1afbe3e3a55d2da045b8e2e42097317e78dc5d9756136f56ba7935ebc604
pdf-font-stream PDF embedded font (sfnt) at offset 0xF550 16048 bytes