Malicious PDF — malware analysis report

Static analysis result for SHA-256 02199672d86d0749…

MALICIOUS

PDF

73.1 KB Created: 2021-07-06 15:54:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9e6415954155e3ce1d88352c87eb4e93 SHA-1: 18556ca32804a6766b031ef7abbc261ad1c845a5 SHA-256: 02199672d86d074941764dc8fee3888ec109944a992b3347183527c96b3a4895
164 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded JavaScript stream and numerous external URIs, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The primary attack pattern involves exploiting user trust through a deceptive document, likely leading to credential harvesting or further malware infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://krisoc.ru/uplcv?utm_term=the+girl+he+never+noticed+wattpad+pdf
    • http://bem-sa.com/img/file/wijukatavigujekutakik.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/kgu4rdf85ojlmim0unrcdjdiug/purofegusoso.pdf
    • https://karinbentum.nl/uploads/file/74958957744.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160e409c82c01f---74163256061.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160786d30ec25c---bebijijel.pdf
    • http://nnrhc.com/clients/9/98/980d61ede38c9a35fe3396fb65651545/File/fusovotabemarozafuveze.pdf
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/a8428ddcff0bf44431d40e6d4225b041/62693813681.pdf
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/74706bb23c4856b8fb4107f653f00af9/60521794543.pdf
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/sii8q5h0i7psvng3piug6g0ee2/84702837641.pdf
    • http://pcmcpropertyblog.com/wp-content/plugins/super-forms/uploads/php/files/45c73cfeac3a1ebeb16b90fb1a5df1bc/nofadawuxefinavono.pdf
    • https://prospr.fr/ckfinder/userfiles/files/suremusax.pdf
    • https://brianhigbielaw.com/UserFiles/file/wuzugejexud.pdf
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/dnnntt37m8j97kbs22fe0tftr4/lalinejuziweji.pdf
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/fbb213bef9da56ac4c2171174e8c7c22/78212024599.pdf
    • http://holidayinntorino.com/userfiles/files/jopudixiwu.pdf
    • http://masseydogs.com/clients/f/fc/fc2e217ffa4851e49ca3cd921a15cf41/File/55087200966.pdf
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd14c6b8b7---jupinisabezegonevuvobaper.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/o8c2ftg1ibf3jfqqlkmkaet1i3/fefisexu.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/7g5ords8bo7uh4p3fqcrpueua5/79364013072.pdf
    • http://zdrowejaja.com/Upload/file/penijaxuturetonotenajo.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/5opehcvcm2iihbk7djf6s00oc5/juzafupixavomatoxu.pdf
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/12618626855.pdf
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/20781399320.pdf
    • http://bahattinburyan.com/userfiles/file/zefemidetama.pdf
    • http://seoulsquare.com/userfiles/file/91904153440.pdf
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7dcd45dd1e---23737560457.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_off0000bb51.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xBB51 16792 bytes
font_01_sfnt_off0000d368.bin
492461c34da54b2080a3f6b85b874e27aea011391c0dd56a38c98b61e24f40d0
pdf-font-stream PDF embedded font (sfnt) at offset 0xD368 10844 bytes
font_02_sfnt_off0000ec38.bin
58eda656896863ad9066de10097b5a6154a808433c5e5345928760f862646afd
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC38 16328 bytes