Malicious PDF — malware analysis report

Static analysis result for SHA-256 3269c89948a980e7…

MALICIOUS

PDF

87.6 KB Created: 2021-09-09 18:45:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 50a8b06721e48bae153e52ff3cec6ee8 SHA-1: 741a3cc92f61b0cc725a71fdf79865e44f3c15aa SHA-256: 3269c89948a980e71bef6bf6da7361c16ff8d4d2f9f47fc88f869a1b62340452
156 Risk Score

Malware Insights

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

The PDF document was identified as malicious by a ML classifier and ClamAV, flagging it as a phishing trojan. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to various domains, many of which are hosted on compromised CMS platforms or disposable hosting. The embedded URLs are designed to lure users to external sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://dotbamboo.com/file_media/file_image/file/70350687037.pdf In PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16132a7677d483---93667155726.pdfIn PDF document text
    • http://grubstreet.ca/ckfinder/userfiles/files/61576323487.pdfIn PDF document text
    • http://kassa.pl/userfiles/file/paramogaguk.pdfIn PDF document text
    • https://fenixfalt.com/userfiles/file/xuviforogegabowutarajab.pdfIn PDF document text
    • https://yomadesign.com/userfiles/Proj_Name/files/zinuniboxogisetusapudov.pdfIn PDF document text
    • http://songdolandmarkcity.com/userfiles/file/50238881372.pdfIn PDF document text
    • https://znalac.com/userfiles/file/35266377669.pdfIn PDF document text
    • https://yuanfuconstruction.com/ckfinder/upload/files/93955057013.pdfIn PDF document text
    • http://yameitecl.com/ckfinder/userfiles/files/20210905_230006.pdfIn PDF document text
    • http://tencanpowder.com/d/files/18034427495.pdfIn PDF document text
    • http://morgancountyoh.com/userimages/3506160526.pdfIn PDF document text
    • https://interativacorretora.com/fotosempresa/files/rupusejox.pdfIn PDF document text
    • https://ezsprinting.com/userfiles/file/71934475169.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/d1e6s692v3b439090qmqqhfu70/tasajilomekavituxaxujutas.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/6eb508c5719ea09abfd9ebbd33d13ce0/jefisuvobizupelimu.pdfIn PDF document text
    • https://magnettoptan.com/upload/ckfinder/files/fobadatajelusuzeni.pdfIn PDF document text
    • http://essentielles-theater.de/UserFiles/File/59985373608.pdfIn PDF document text
    • http://abwlondonblvd.com/uploads/files/60084307737.pdfIn PDF document text
    • http://foto-recepty.sk/images/fotky/kuzudunose.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/bilaler.pdfIn PDF document text
    • http://baraanduliaptti.org/userfiles/file/dexopej.pdfIn PDF document text
    • https://solidpractise.com/files/userfiles/file/vopukabozugotuwiwakovoli.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161311e2cb3169---52964761952.pdfIn PDF document text
    • https://www.abrasco.org.br/ckfinder/userfiles/files/46361210189.pdfIn PDF document text
    • http://cke.hk/userfiles/riwemubomejo.pdfIn PDF document text
    • http://ty-universe.com/image/files/20210903_225318.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=covet+fashion+cheatPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f18e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000109a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A5 10384 bytes
SHA-256: dc8a05861c2747262128b36a6d6afa2fd9f5fc7dc9084f9454dd1072f2a9398a
font_02_sfnt_off0001212e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1212E 18124 bytes
SHA-256: ae10009b3458708551e58c58e4d03eaca2d498e81d0e546ef8dc2a89a7d9e6a6

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