Malicious PDF — malware analysis report

Static analysis result for SHA-256 c47a91fd2329e5bd…

MALICIOUS

PDF

95.2 KB Created: 2021-07-15 18:06:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dae0894943c87bb20263e509d1703603 SHA-1: 2861f73ee25bd52edbe2156fd77414d51c16956b SHA-256: c47a91fd2329e5bd5e6955d20f5cbe5f61aab12b98c2093b002a57b1212d1d21
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, specifically within form upload directories, suggesting a link farm designed to distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, and the document body was unreadable, so the rationale is based on the URL heuristics and AV detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9866

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 http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607132015f06c---zazikubadizasu.pdf
    • http://winfielddeli.com/ckfinder/userfiles/files/44007294475.pdf
    • https://agentcctv.com/userfiles/file/nukobedejesidisige.pdf
    • http://orgue-chantepie.info/FCKeditor/upload/file/bozoziwa.pdf
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/a236343cdf3a16e49658693c5b75300e/xevolebimo.pdf
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a29dfa780b4---61262555786.pdf
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607927fda86c3---35123812499.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a28190876c2---zegefigabagirarowigi.pdf
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/823b0508b6480043699ee900650ead1e/29262101534.pdf
    • https://wagaskar.com/media/gekirulitaj.pdf
    • http://gphs100.com/clients/e/e3/e3ed30f4e85b1ff1e74f61348c82e8eb/File/moropiga.pdf
    • https://zabulgaria.org/userfiles/file/kawapufun.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a308d7dd281---jetul.pdf
    • http://archerelectricsupply.com/userfiles/file/kibulejinubenomozukovi.pdf
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee38d28f173---bilet.pdf
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae757a36663---gabad.pdf
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/lbn97k20ot3hvhtqjsdqa5qhu7/42334067983.pdf
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090709c8ec4d---judefisefewekarofadav.pdf
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcd124c88ac---46899820366.pdf
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f7153c0b2---91418245002.pdf
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e2c0dd7da---91609225050.pdf
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160ad927281415---fuxunukodixon.pdf
    • http://tdvvietnam.vn/webroot/img/files/tuvanoriju.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=the+meaning+of+upheaval
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e636.bin
0a2bbcaed8ab0811463f10abfbc67651b92b3e000f66ccb19ad58acaac1bb0be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE636 10568 bytes
font_01_sfnt_off0000fe14.bin
fa77d53479f002e60d684f3ab89c4517e45c55453408b5a4560e05c8bf1d98c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE14 16796 bytes
font_02_sfnt_off00011667.bin
134e6068dab1761822e434b208afbf22b37d0844c7ad68e265ebc5000c7c6d3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11667 21052 bytes
font_03_sfnt_off00014bad.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14BAD 16792 bytes
font_04_sfnt_off000163ba.bin
d64ada313a67842c72e2bb8229ade9a737d3cfed378994df3457dbb044da9530		 pdf-font-stream PDF embedded font (sfnt) at offset 0x163BA 2556 bytes

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