Malicious PDF — malware analysis report

Static analysis result for SHA-256 3064c491303112b0…

MALICIOUS

PDF

89.2 KB Created: 2021-07-03 05:48:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f175bdd59da4598975560cf71149bec2 SHA-1: cfcf976878e92a64a063c65cad167f3dac6f9cb4 SHA-256: 3064c491303112b0b408bcb57182a31f2c76e669f404018f7672ea3ee28389ab
156 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to compromised websites and disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or a trojan downloader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crewmak.ru/uplcv?utm_term=latest+format+of+informal+letter+in+english
    • https://alamansyria.com/userfiles/file/jebabakateludali.pdf
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a84fc57685c---xizogozamewo.pdf
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/a715052029353b6e84b370d27971fb9e/pinomasulat.pdf
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160894028f0182---25053821438.pdf
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609874ab385f4---wagipajimixojoxanufim.pdf
    • https://ovistar-dz.com/ckfinder/userfiles/files/xemimavofuxisadedu.pdf
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/u69hk46kfegjksihmi05qgj5n1/jonofesiropamoxakum.pdf
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//32049012352.pdf
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/07pubimcev4loj7kld306je8s8/52948556165.pdf
    • http://franklinbristerharveyfamily.com/clients/a/a8/a8910385c57dfddac3c6311e2bd1422e/File/75116087160.pdf
    • http://vgkbuilders.com/assets/files/14091120260.pdf
    • http://articolo17.it/siti//usr/foto/files/vejixovi.pdf
    • http://cokhiminhhien.com/media/ftp/file/ratatubafuzezowavujin.pdf
    • https://rybczewice.pl/userfiles/file/nexixanipiminumosavalumuz.pdf
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/bd7c917fceeba02a983dde4e9c28ab0d/32700457691.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/06822cbc4f9c1b006dc33324fa6a7d66/terewaduf.pdf
    • https://cambodiadriverservice.com/userfiles/file/70266666494.pdf
    • https://topclassgreenery.nl/images/file/32390302503.pdf
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608c20412022b---28540262996.pdf
    • https://abugfreemind.com/userfiles/file/potovexubifexurarekar.pdf
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c872d122c87---47948009892.pdf
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/818a103914242cf706cf60ac88ee1bd1/vudogunusuj.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/9vjnr0omgelgks290o6mfb4if2/sodirepuki.pdf
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/32adfcaac29ddad83884b2e7180b2f75/6824154592.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608a1305b3be9---39968441449.pdf
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9ae134fa71---gatepasog.pdf
    • 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_off0000f6d9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D9 16792 bytes
font_01_sfnt_off00010eeb.bin
ca2f8590c4cb9fe6293af518b7a317320bf460b34a1e802b6193aae5d39f8f6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EEB 18720 bytes
font_02_sfnt_off00013f4d.bin
c2d18ecf03b3e97b97318fdfc628301b60ae1a0a4e1b94a96329ac730e0d99d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13F4D 10620 bytes

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