Malicious PDF — malware analysis report

Static analysis result for SHA-256 caf544f113257c4d…

MALICIOUS

PDF

78.3 KB Created: 2021-06-26 09:38:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ed4c9725598f7f8cb686f170cba0bcc5 SHA-1: 5ff83132fa89eaa79cb40b3c40170fc5e7b73b22 SHA-256: caf544f113257c4d93f28ea897fe48309297ca5e4771f1bccdb470c50058baa2
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable domains, indicating a link farm designed to lure users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://rajatotogroup1.com/contents//files/gazamemisopawawutej.pdf
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/2236eff83ea2f75d5b197d0692d51186/zimanudiwat.pdf
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/6b53d4275c2b5049afd681f388bba794/minapoluvejitetizo.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/fd611db2deee5d7e15b96e00cb0a1932/14353876116.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a19d3dfa82---laxirutagema.pdf
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/ccc3443bf608409696f4f3023122c5fe/sitizewuvirokutujovi.pdf
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086cca0477d6---gosakufefunimu.pdf
    • http://studiogiovannone.com/userfiles/files/tonigama.pdf
    • http://toddfamilyreunion.com/clients/4/48/482e924d5a052aa4a0c13eb8a30e0bc8/File/19783659687.pdf
    • http://agriturismofattorialucciano.it/ckfinder/userfiles/files/4816887734.pdf
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/mjcillm3bdf1fu3iannvi60tnp/rusorogapinojediwogogapog.pdf
    • http://namadagaskare.ru/ckfinder/userfiles/files/kigilesago.pdf
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/34htps1enksnt1amp5kn1d67u0/nozijo.pdf
    • http://controldellaves.com/app/webroot/arxius/file/dofarupufifobixofobo.pdf
    • http://ceskylakros.cz/userfiles/file/98162668456.pdf
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/j1pq2m79u3hc8t0m5aal6325l7/6095283754.pdf
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/dc57b0324615654df3b552513ac87078/28212897321.pdf
    • http://cmtdental.com/upload/ckimg/files/70530722282.pdf
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/d14ec20c380306cb1182ac1b2a88b318/lagunomosojitotovibex.pdf
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/c76e686b1c7ae889ea8cd8d40dd20bca/93137542544.pdf
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/990e495ad76e036f92c7609616109fdc/22774067657.pdf
    • http://dokumsuzgec.com/userfiles/files/14030081391.pdf
    • http://clairvoyantinfotech.com/demo/images/farowonimoko.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=force+and+motion+test+answer+key
    • 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_off0000ccbb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCCBB 16792 bytes
font_01_sfnt_off0000e4cd.bin
819316ee5ebf3e03984bd7868146fa21ba6a0afbc1b88aa235d87917e4cef91e
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CD 17096 bytes
font_02_sfnt_off00011188.bin
ab45c5626a38ce59435880346b2779f58d636d8bfee2a94de302736f548cda1a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11188 10752 bytes