Malicious PDF — malware analysis report

Static analysis result for SHA-256 0199d6ba7e044054…

MALICIOUS

PDF

84.9 KB Created: 2021-07-08 02:52:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6dc8e6c44c07fa463b0a1425e48d9c99 SHA-1: a526029cc07d6e61a02720e36ef86810bb71a2a8 SHA-256: 0199d6ba7e044054dcc7a65acacecf5fe6a790f9385b93352c808bc01ea4c962
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to redirect users to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7e0c0e4c3---tuxejopegojodojo.pdf
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/4qfkgknq4stp5jq2lsvq5ablvc/takeje.pdf
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/f8nu7nihvbmun4igp5gjkkqfk0/masasosepezenagud.pdf
    • http://nicolalazzarotto.com/userfiles/files/zusuwadetadowirisonobujo.pdf
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/0a156e9574c6585d4ac648eb30fe788d/50850629450.pdf
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5e066355c1433179cff0f72334783b7c/jerofawotitozi.pdf
    • https://mimpiindah2.com/contents//files/futipadonowun.pdf
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099ad8300174---burapudelorej.pdf
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/88a8da39230d2818c7cefc81a0f8f850/tonorev.pdf
    • https://profipreklady.cz/www/ckfinder/userfiles/files/63331261050.pdf
    • https://bakwanudang.com/contents//files/jirobiwepezenos.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b3c8f0b34---fozaropulirisibebe.pdf
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/4fa93e4e58abe3100ed86ae0e1e06ba3/gamawafa.pdf
    • https://www.ideaklinikizmir.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe2f1ef3ca---15742036387.pdf
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/c201fadfcf6a4eb39fe68a05ea57d9c9/fapaxisoni.pdf
    • https://pensiunea-escape.ro/ckfinder/userfiles/files/tupalokopakipumupidewaxo.pdf
    • http://www.jacenter.org/js/ckfinder/userfiles/files/67782284265.pdf
    • http://ipceurope.eu/assets/file/bawakuxikodidoxonizika.pdf
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/ac65894df401f4fb1e349c7d57478646/26237547651.pdf
    • https://tavio.ru/files/file/refuwekixipin.pdf
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/b45bf5a37a3818aadc31f90600367be3/67804343833.pdf
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b4c4a9261---jugamumoxejijesonelona.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f9eb98375---24345179434.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=beasts+5e+by+cr
    • 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_off0000ea59.bin
5152ffefea48ec4917c5d76413686cd37271a66bc196ed75acf4765b16642c29
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA59 10304 bytes
font_01_sfnt_off000101d5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x101D5 16792 bytes
font_02_sfnt_off000119e7.bin
45d39fbc35f19ed4ddcb7ffcdc8e0420ab00048ea58d7821d405d068ba6ef4de
pdf-font-stream PDF embedded font (sfnt) at offset 0x119E7 17032 bytes