Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eb2c636085b2bf7…

MALICIOUS

PDF

93.1 KB Created: 2021-07-01 00:08:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 15ea23207960f978481b9f121143e905 SHA-1: 268520e00441101c3589cedf43b5b4a5d94d9727 SHA-256: 9eb2c636085b2bf7b576ef9d5d2a977cfe3da51e9b0621a39decf814fd3260cd
164 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which appear to be part of a link farm hosted on disposable or compromised domains, suggesting a phishing or malware distribution scheme. The presence of a 'download button' heuristic further supports the idea that the document is designed to trick users into downloading malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crewmak.ru/uplcv?utm_term=resignation+letter+because+of+health
    • http://12shio5.com/contents//files/bidatabupetimuk.pdf
    • http://studiolaviano.it/userfiles/files/dokidelunewimidobirobin.pdf
    • https://roomart.uz/ckfinder/userfiles/files/17682699940.pdf
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16085c730958a4---68416876783.pdf
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/1k62k3bpja2df1f6qestq67kl3/95113439095.pdf
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b406b9352aa---mitabasi.pdf
    • https://go2germany.ru/files/file/zuziripapibu.pdf
    • http://sitoad.com/bbqjoekey/files/202106172205186608.pdf
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/6e73257a719919672a057a9dbd3a20d8/zazupufisikunexinelerinar.pdf
    • http://akinmedical.com/uploads/file/lisafugezetivesolamasovo.pdf
    • http://polish-house.com/uploades/fckeditorfile/nixobubefamomenasitilab.pdf
    • https://okazdedziecko.pl/_files/Media/file/33788087191.pdf
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/sotudofubovevaturiwu.pdf
    • https://autotrans911.com/thread/admin/uploads/file/bilaluxo.pdf
    • http://accronline.com/userfiles/file/soboti.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/q8nr0rrhb9tpfclh8bkqbmjbq6/13326644233.pdf
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/he5matcuon6gqg87qdop6lk831/39373827242.pdf
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c416e9df6fe---lozaminanalaxawatirume.pdf
    • http://stalmost.pl/userfiles/file/ranapagipa.pdf
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/40e86a95d2ec7641de59ae98cf2d502e/38392373382.pdf
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/gel4r0la2qdkpbmtkhn6dr8ldh/jizezubemaj.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bba2dde2c04---69099055252.pdf
    • http://r2doodles.com/clients/4/4a/4a4ed909dcef54c1e3ec6a0ce1d29f2d/File/27468141037.pdf
    • https://pakistanchristiancongress.org/userfiles/file/395539605.pdf
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/q6v0uuig8ssjs3jqj90kncq637/fenipot.pdf
    • http://curry-box-deluxe.de/userfiles/file/teluk.pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b23.bin
c4464ead015d1727e981c00587a4b0f2fda04bcfd22220270756b1dfacfadc93
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B23 10900 bytes
font_01_sfnt_off0001245b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1245B 16792 bytes
font_02_sfnt_off00013c6d.bin
d7109b3ea18ba258239399c5aeffca8165e8831c5103c27a5264cd1e342f7a24
pdf-font-stream PDF embedded font (sfnt) at offset 0x13C6D 16416 bytes