Malicious PDF — malware analysis report

Static analysis result for SHA-256 e97d25d53aab9f4e…

MALICIOUS

PDF

101.2 KB Created: 2021-07-26 00:43:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7eaef2a7b6b04415acf1f75621506ac0 SHA-1: 5ecb755ea2c2ebf50029f2d09a0f03d5df633376 SHA-256: e97d25d53aab9f4e94a66dbcf569feab9760f5eef7878d453924cdc3607fd1a8
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to compromised WordPress uploads and disposable hosting, likely intended to trick users into downloading malware. The heuristic 'SE_SECURITY_BYPASS' indicates the document may also instruct users to disable security software, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://adasms.fr/userfiles/file/67105150086.pdf
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c46f8660b95---59243785177.pdf
    • http://edu-family72.ru/content/images/uploads/file/96265387204.pdf
    • http://www.chp.pl/ckfinder/userfiles/files/91849316669.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607c713380743---63888944250.pdf
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c6369368084---jebojape.pdf
    • http://kentcliffordreunion.com/clients/a/aa/aa84b18e55fac3ff3c25336c5005d9e5/File/xazejile.pdf
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/bbce7ac6fd2fdc14565e7a5d1bfed5bf/mifitevesamemuxamuto.pdf
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/i6c2o7b29iuc6484spngdpmoto/xopapimuxogezimexojamuwe.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b76321b8f68---lesupavuwafe.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5564e31fdd---59515762566.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/ca165730m2pfmfa5f65mqdslfq/66164927539.pdf
    • http://lamexmarket.com/uploads/files/taxapoforolegibomabival.pdf
    • https://biocoils.com/img/file/47279772372.pdf
    • https://sjamsul-hidajat.id/ck_uploads/uploads/files/rupamuvafif.pdf
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb0840070e---gebofipi.pdf
    • https://fotojursa.cz/userfiles/file/mipeme.pdf
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160862c7acff69---rikefewixonelu.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094763ec9490---42756837860.pdf
    • http://ellev.fr/upload/files/93164025866.pdf
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160e4af3f7a898---9706551293.pdf
    • https://drsubhashawale.com/ckfinder/userfiles/files/zufovudosugot.pdf
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8eb4a1f2f---volen.pdf
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ed195c330---52779972618.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=epson+l210+reset+ink+level+download
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001108a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1108A 16792 bytes
font_01_sfnt_off000128a1.bin
9b78f5452d6aee0a9e4d89fd46c060bd6ea7b37dd19910e8910a8eb761f92e9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x128A1 10908 bytes
font_02_sfnt_off00014216.bin
99214031c837f741102ebd17e903118d9225d72cfde1c44edcda6b6ac1e08b1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14216 17592 bytes
font_03_sfnt_off00017045.bin
09562ca2d5000ae2f2345c4ffb282664df80e6add20478162cc85c395b82892d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17045 16120 bytes

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