Malicious PDF — malware analysis report

Static analysis result for SHA-256 c433c5e0a57481e2…

MALICIOUS

PDF

85.9 KB Created: 2021-06-27 23:35:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 038da8fc8c02e5f53fbc69832472f7a5 SHA-1: 1ad7bc01641b9b42f653bc3b62fc90dbde038bda SHA-256: c433c5e0a57481e2b0e58de3112fb41ca1ae14d51eddeda5a3e30e1c95c50405
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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 https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/9d33aca55993587aa358786f8f792f23/muwujopewunagiv.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160701811453b2.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/lon918a4nqfqkmpru5dcpj68fu/5027119005.pdf
    • http://cn-junsheng.com/upload/file///20216814313773.pdf
    • https://bucatariizidite.ro/printuri-fi/files/55822757578.pdf
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bbfcd57d8e57921561d45dd07ef38add/zagidurowikulowavilivo.pdf
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/4a6e1ee3305c0f571ec6da6937a4a8ab/tebakevoxidetavolezenewuk.pdf
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16095ab3938fd3---2154787376.pdf
    • http://quickvideo.nl/userfiles/file/31387069463.pdf
    • http://chiron-ventures.com/chiron/home/img/upload/files/210620030421993149d4o72.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a06da5cb517---45129478134.pdf
    • http://liyangah.com/Upload/file/23365477968.pdf
    • https://abofahed.com/userfiles/file/begojuvudezimepizefuzibaz.pdf
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/a8f912d2e04507774f874dba5b49203c/lojuwilujolipix.pdf
    • http://footstepfloor.com/upfiles/files/gokobepilolekipo.pdf
    • http://worldcar.jp/userfiles/files/robovezademuvenorajor.pdf
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160724e35a4807---devovenovob.pdf
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160b46c5fbbd76---59398778286.pdf
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/fb23f73352190ea12b08bd80cd96e0a8/276733133.pdf
    • http://reicar.dk/userfiles/file/56669699392.pdf
    • https://alutat.com/data/file/8231484751.pdf
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/612e2b17906c1a9c9b26c655aeb4568f/3118018217.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160836a2f65fd2---61175471356.pdf
    • https://o-dance.com/upload/files/97293081868.pdf
    • http://fence-alarm.com/userfiles/files/nanajamivawo.pdf
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/ca59af5fbbff56fe8b73c441eaebf58b/bibumukitixopufusakubul.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=northern+comfort+heating+and+cooling+inc
    • 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_off0000edde.bin
ba2178331195970c4de49f67553d2a1bc1d4176182d5a2709457d6ac6ae1be76
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDE 10732 bytes
font_01_sfnt_off00010614.bin
437311a76bb290da12ce154b84adb364b85f3693c2736364f0a6deb1d79f7723
pdf-font-stream PDF embedded font (sfnt) at offset 0x10614 16956 bytes
font_02_sfnt_off000131da.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x131DA 16792 bytes