Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9467c3451584c8b…

MALICIOUS

PDF

105.6 KB Created: 2021-06-30 14:21:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c259bbb74bfe3f3e8c559500b1f65681 SHA-1: bd50b19852e52417b6139c4e15b0356ae23aceb9 SHA-256: c9467c3451584c8b35613206c2a461dcf315283f09aaa92a6787999ada0c36b1
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The document's structure and URL patterns are consistent with a phishing lure or a downloader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9654

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://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/hlni857htph5l6tmfeaa2i8d2e/ralupaxugobazodimo.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ca3600c0c90---figotopudetisogor.pdf
    • http://beiks.info/public/file/begisovivigaresewuwuzifel.pdf
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/4650438a4126df47c66e8e20d56871a4/61890587873.pdf
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4b8dec7aa---51499193732.pdf
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/3089lh6cg6em09jieefac129d9/guziroxopipibajufud.pdf
    • https://mn-lawfirm.com/box/userfiles/file/xidugewasuniwo.pdf
    • http://popnmusic.fr/userfiles/file/58758019506.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/ukihkro3as6033kn6trise0jnl/16315534478.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c89ddfb2c---86066108335.pdf
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160c71c3ca46aa---zukezexutiva.pdf
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/1a35a65b80832cdf18e3e347c95f961f/24369269762.pdf
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/ff93f2e688bce7adced18ec64d8ed5f1/55456278742.pdf
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/5ma1mh8bm3r4vemvetcqas8rsf/sarutewasuzawuniragep.pdf
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/50063d253d7b3d90ce4b768137bf500b/pugagevitijeri.pdf
    • http://artecgroupservices.com/imagenes/file/texifegukeweb.pdf
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bec283a87d1---18282282861.pdf
    • http://daydreamspin.com/userfiles/file/37028731137.pdf
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607904a372a12---gifanazoxipukija.pdf
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/6abf7aa5fc1513878ab85225f77f1ef3/12381035319.pdf
    • http://ineke-ott.nl/keramiek-beelden-imagesfile/dofilejulilumekupepoje.pdf
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ddf04499fa---fidonefebusus.pdf
    • http://kibbkw.com/uploads/file/74544665017.pdf
    • http://eastmoorclassof1970.com/clients/4/43/4343e427eb1b0a0668350338a4d6b623/File/fasosa.pdf
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/llqs99v9luakeq8m5ddhhco446/37735083934.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/885fab26e3e53bae852a796ab0651432/xuliwexixitezuluzolaj.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=top+10+most+beautiful+animals+in+the+world+2020
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012228.bin
7d12c3009d5651c93dbc068d8828cf67f23ff2ab33461a7ad11c89d7610537d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12228 17044 bytes
font_01_sfnt_off00014e88.bin
adc3a919485a1fd568386e5745f1f5f32987729737b9c4fed734941aa606a88e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14E88 16572 bytes
font_02_sfnt_off00016593.bin
370ea02be21122e0cf8fd6404707b446a0ab9bb2400101e00a068066bceec3ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16593 11344 bytes
font_03_sfnt_off00017ff6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17FF6 16792 bytes

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