Malicious PDF — malware analysis report

Static analysis result for SHA-256 e106dad1b5961e05…

MALICIOUS

PDF

89.4 KB Created: 2021-06-26 12:10:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 76d5bf43a14a3a4c751c72145045dcb4 SHA-1: a43162aaf8fbf41f93e28b1b70de0a5938d5a09b SHA-256: e106dad1b5961e053ec24246fed1b9a6cd19d56d6513d1d83ca5e379ba233e06
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of multiple external URIs and link farm heuristics strongly supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://alarcon-v.com/editor_upload_image/file/63943732064.pdf
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/hi6alnkc0ph7nmfat678m9nj9c/tipiboxenorasavegafesi.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607addad78cae---1826767479.pdf
    • https://birudongker.com/contents//files/82391726345.pdf
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6ec29b3cb---26331607978.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/7g7opbagmq6rvhlifi43t064ca/mexuridetititogevi.pdf
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b71a36545e---fuzapogorajugodakazum.pdf
    • http://logo4you.dk/userfiles/file/8843349713.pdf
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/d8462c13d5ebb16de6b7b2dcf9abb0d7/jimuzajuwewazuw.pdf
    • https://airflow-skateboards.com/upload/file/tepeluxalagadafajipod.pdf
    • http://oio.cn/uploadfiles/files/gunipapedumafivesa.pdf
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160abf12ed31f4---24601295993.pdf
    • http://africanhairbraidingsalon.com/userfiles/file/vumimezuligufop.pdf
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b0f71031bc0---52082292377.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/89d420cbc5065fc6efb20057d75f793d/40712955056.pdf
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2c7842d6a---joxaxamuvuz.pdf
    • http://computerdoki.hu/user/file/82994267524.pdf
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/9e801430f411f617e651bf4d575c91f0/49521151180.pdf
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1a1a6b6d2---tavokixopote.pdf
    • https://aduanaldelvalle.com/userfiles/file/1383184635.pdf
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/c71455a2068d19ac0be7d6ee3a0725d8/fasovogor.pdf
    • http://stark-tools.ru/images/uploaded/80996074896.pdf
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/67376560a16cbb12565207487d78b5c0/xurelimisemexeduxegalil.pdf
    • http://geluidsadviesnederland.nl/ckfinder/userfiles/files/ludinudubibopidimot.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5d8b818d2---25727000804.pdf
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/0ct7sbgeat4ib6tp256qq9kac5/wokovoxi.pdf
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bd76f2ef579---18573730331.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=bollywood+songs+mp3+free+download+a+to+z
    • 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_off0000f88f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF88F 16792 bytes
font_01_sfnt_off000110a1.bin
16defe116230d4b320283d0349af67e3e9d8041303b45c50d0d74fd777c18074
pdf-font-stream PDF embedded font (sfnt) at offset 0x110A1 17096 bytes
font_02_sfnt_off00013d76.bin
e4ad4a5ef75cff03b8307e48484050272532931a3fa683fbb1c0830c95c1130c
pdf-font-stream PDF embedded font (sfnt) at offset 0x13D76 11236 bytes