Malicious PDF — malware analysis report

Static analysis result for SHA-256 08f7abdd691a8738…

MALICIOUS

PDF

86.7 KB Created: 2021-06-27 19:41:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b91f9a039cbd0b0369fafd8013c1ddd5 SHA-1: 1c2b6048736eb042a5c16c64c98cad3db73a2a92 SHA-256: 08f7abdd691a873851f1a17514b6f9c21d1bc13f2b0b05174fcd9e3af86b2296
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a link farm pointing to multiple compromised websites, likely intended to host malicious content or facilitate credential harvesting. The presence of embedded URLs and the nature of the heuristics suggest an attempt to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://behagi.eus/files/galeria/files/41166410476.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf0c3cea3f---nifasenolototevufuwize.pdf
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16087af2c839aa---bijanuruwagonugure.pdf
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/p9dqbfiejg308mugio7ql2u0o8/rojigajevofubinugopuxabej.pdf
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/578005ed7d27edf8a891caff59b789d5/13328529189.pdf
    • https://arerp.kr/data/file///pemejajilakusi.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160986b2b4d467---60920214878.pdf
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1609b306cddd9d---wuwoguzomotemuluwina.pdf
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9e2f62498---77215389468.pdf
    • https://alatheir.com/atheirwsfiles/file/wovinole.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160becee77f47a---larevagajagupufuzal.pdf
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/84b0fb797afbf7415f8f69cba4116085/gabilodumexo.pdf
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/0fd6a586cc7abdd8673d7ba1485ee071/xuvaf.pdf
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160925439ece98---zedewexanukezenejuve.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079276512343---gujekufijexama.pdf
    • http://remobudostol.pl/pliki/tuborojeni.pdf
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/778e2c79402170bbfe3c19ba45bab9cb/59609105861.pdf
    • http://uceng.net/_UploadFile/Images/file/981793956.pdf
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/55mut6u3rjnd86j6g4j5uubkm5/74184013862.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16080d8c7b3795---dodutiluxowutijibojukike.pdf
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16080769f0150d---21977836182.pdf
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/c5135fcd23062c05e0f7e7ada6ff5d81/zusitupu.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e57d6cf5a0---bogufo.pdf
    • https://combrooncom.com/contents//files/59587598251.pdf
    • http://brenno-tojestto.pl/userfiles/file/10279228479.pdf
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d1debcd85df---jojobiwivofoguloridedam.pdf
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/5obaaigtud7om1sqlvgtkeulsk/55362917054.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=protection+from+my+enemies
    • 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_off0000f2f7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F7 16792 bytes
font_01_sfnt_off00010b09.bin
25ecfe04e05ef5ac645d30ad5248684238ac26d81cf8cd725fc1e794b0890da2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B09 16520 bytes
font_02_sfnt_off000135f3.bin
8b4642264088c1a8ca53842b580cbb5bb448092cdfe8527a6593e649acf30a00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x135F3 10404 bytes

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