Malicious PDF — malware analysis report

Static analysis result for SHA-256 dffc24f83937ed06…

MALICIOUS

PDF

90.0 KB Created: 2021-07-03 17:17:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7cc636ee70dcde9cc17a06fa9573d4ad SHA-1: 61b0bea90ef9e22958dd3298d85c8152d7be716a SHA-256: dffc24f83937ed06c22f59d517db22402b7fbb53c2c3008479559dd3c03572ed
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by a ML classifier and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure align with a phishing attack, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/auh90qen96knrvjd5vf4cc4c10/20308555152.pdf
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/6716ef619109b0bc3737641229880045/rinuji.pdf
    • https://aashianarealty.com/file/74445939002.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609d181bc4efb---1124216412.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2c867efb5b---mowurujefuzepunipo.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c909ed269c---kemuxipuxanipijiku.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f8dc73d356---xotuz.pdf
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/78caigufb2vtd82o018ddnfad2/zutag.pdf
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a49b5301f0e---83639794443.pdf
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/fe37b29194343be55742f1303a38111e/18558660425.pdf
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/mmrkb9hsfdqpn0eksq2k9ouc5n/vawanedadog.pdf
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/16077497d20057---87383546237.pdf
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609102c719d13---baxufamezuxawota.pdf
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/r6l5q7gv7kckm7oa8mvt65h37t/xojopapefekizodagi.pdf
    • http://beiwendq.com//data/attachment/file/32094957323.pdf
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607816387b24e---44557826908.pdf
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/c506369ba705dc336df8bad2e2cce123/xixasasorinuwagugidezewaj.pdf
    • http://richardarnoldalumni.com/clients/a/ad/ad1dcfa6f69ac51e3fe6bec18f6cf6d6/File/fawavoxobujizowe.pdf
    • http://mea-travel.pl/userfiles/file/zefusedebej.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b74397e387d---37195584114.pdf
    • http://aaaexpressac.com/userfiles/file/konelenumawagamodovid.pdf
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/1c8d4cd5a222f58ce35d955b76bb4927/56623631620.pdf
    • http://prplus4u.com/ckupload/files/2672161331.pdf
    • https://aawyx.com/sites/default/imageuser/file/83964801267.pdf
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/6a9b52d19197177575be49b8e6407bab/kibegoselizobe.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb9bd07a23---guwubitigoreti.pdf
    • http://tipsclubcr.com/campannas/file/faxefusitelafelum.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=thank+you+for+considering+my+application+meaning
    • 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_off0000fbd3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD3 16792 bytes
font_01_sfnt_off000113ea.bin
5943d4c6bf590ecd54639bbf546b02d45fa42690c77e83516d8a425789dce1a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113EA 11336 bytes
font_02_sfnt_off00012e36.bin
5f6624ff038ab8a3768fdb3cf1108b914759583f51e804ae8b2c9ad1a6779aad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E36 17520 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.