Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e7efabe057ea73b…

MALICIOUS

PDF

88.6 KB Created: 2021-10-04 13:42:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: db6dbdd523fa975c8e89aa5d27f7fa12 SHA-1: c9b83f7ca4d2a501dc37198ade4b98237eef563c SHA-256: 6e7efabe057ea73b2ba1a6c76279f6083b683e38fdb7819172ae9d9842b0bc40
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://adimhukuk.com/resimler/files/bujujawamipubalo.pdf In PDF document text
    • http://flapboxes.custompackageboxes.com/userfiles/files/xaliriwanorarele.pdfIn PDF document text
    • http://iuoooo.com/filespath/files/20210930093302.pdfIn PDF document text
    • http://mawaevents.com/uploads/file/devezuzutakoje.pdfIn PDF document text
    • http://ssss-sangam.com/userfiles/file/vufutedawof.pdfIn PDF document text
    • http://baloneacessorios.com/_upload/file///36007080798.pdfIn PDF document text
    • https://accessnepal.org/userfiles/file/gagupojigalovimi.pdfIn PDF document text
    • http://bebaldebaran.eu/userfiles/files/sunipugoner.pdfIn PDF document text
    • http://texinpack.com/uploadfile/file///2021090209525211.pdfIn PDF document text
    • https://encoyun.com/calisma2/files/uploads/26647944175.pdfIn PDF document text
    • http://ride-on-earth.com/images/blog/file/daseponuz.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/1f28522cd4fc372483e3a7dbf99de9da/34913318105.pdfIn PDF document text
    • http://bebaldebaran.eu/userfiles/files/mabolisuvorabulam.pdfIn PDF document text
    • http://goodlife88.com/uploads/files/36970187997.pdfIn PDF document text
    • http://vibestedu.com/_UploadFile/Images/file/18326100705.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/902e7af0c72b516e527faa3be4dccc55/dukoxowalifiwoxegudin.pdfIn PDF document text
    • https://profipreklady.cz/www/ckfinder/userfiles/files/87847225028.pdfIn PDF document text
    • http://cnwt.mgo.cool/upfile/files/2021/09/28/molabexanifosev.pdfIn PDF document text
    • https://bc2000.order-pro.com/ckfinder/userfiles/files/fusivojunoxisojopotodimef.pdfIn PDF document text
    • http://acudrved.com/ckfinder/userfiles/files/95744231739.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d57c200207---veserawased.pdfIn PDF document text
    • https://www.wizzfizz.com.au/application/third_party/ckfinder/userfiles/files/ditabi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=my+side+of+the+mountain+chapter+questionsPDF 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_off0000f4ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE0 17816 bytes
SHA-256: 581d2bf4e60ae46fa26f2f4004a8b54a3a891c12156bfc1ddff1cd45a5653f0c
font_02_sfnt_off00013a31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A31 11192 bytes
SHA-256: 6596efd976dd52f4c664c3c3a98e6c21c387b2cc1554b747224397255e382072