Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd82e7e15a1da30b…

MALICIOUS

PDF

69.6 KB Created: 2021-09-25 17:04:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: e0d4d7d25a44a3516dc7a8a0389aaa46 SHA-1: 990d295f3c24b8909d32e9cfb1923f95516a16a6 SHA-256: bd82e7e15a1da30b7d520599f4f732d1849736a662e58ef7ff445f270b02a8d5
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The primary attack pattern involves directing users to external URLs, likely for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://allytemp.ru/uplcv?utm_term=zoom+animation+android PDF link annotation
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/81b14446a46581ab235898144859d183/bedujorapipubo.pdfIn PDF document text
    • https://kozlovka.mebel18.com/uploads/files/gefit.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f57394cb64---70546273129.pdfIn PDF document text
    • https://bhopalliteraturefestival.com/mpsdp/uploads/files/pibidavifelepixa.pdfIn PDF document text
    • http://kovofilm.cz/userfiles/file/variluzurunajes.pdfIn PDF document text
    • http://55pluscommunityspecialist.com/userfiles/files/46821873576.pdfIn PDF document text
    • http://bolt-go77.com/fckeditor/userfiles/file/133425877.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143dc3baf855---worisex.pdfIn PDF document text
    • https://safecampus.in/cmsCart/upload/file/47404051497.pdfIn PDF document text
    • https://ezsprinting.com/userfiles/file/33042633080.pdfIn PDF document text
    • http://giprozdraw.ru/ckfinder/userfiles/files/8934143201.pdfIn PDF document text
    • http://conblocmanado.com/pics/file/zivubilujalikuzed.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/d48fb8ae57afca2c3936077868567348/97555241827.pdfIn PDF document text
    • http://glampingcaravan.com/userfiles/file/20210917061833.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/85687738689.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/99896691076.pdfIn PDF document text
    • https://futurefacesnyc.com/uploads/file/bidaxopinugiwepugegati.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fdcfb11685---34431762584.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b71d6e4ac6---47887173765.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles/file/73012121746.pdfIn PDF document text
    • https://blsautomation.com/ckfinder/userfiles/files/4622268415.pdfIn PDF document text
    • http://erpsamik.com/ckfinder/userfiles/files/tinawokovojid.pdfIn PDF document text
    • 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_off0000b2bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2BF 10024 bytes
SHA-256: 4ecacb412c2398d827b569c41a9566f72d439f97449c114928bde6a403de42f7
font_01_sfnt_off0000c8ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE100 15792 bytes
SHA-256: aa2eb5e9606271b0891f995678d4dc1a3c8be02cc90fc57add06f6170392e8bf

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