Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e2b2f69d8b097a0…

MALICIOUS

PDF

80.9 KB Created: 2021-06-30 21:08:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c3e84a4be7df22359f90b76c4deadb74 SHA-1: e632bea2912ff65183c25ff734c5d896733a9f52 SHA-256: 5e2b2f69d8b097a01453b8ee7934d3381f20c33287f9c60a2aafc0063cce9992
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload directories and disposable hosting sites, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfac6cad35b---kidolewisafanukodazusiwol.pdf
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/37f53d1225f7926b39d0ff1a77831f6a/taninijuxizivewesaju.pdf
    • https://baongochoa.com/upload/file/694648779.pdf
    • http://adamlegal.com/userfiles/file/dabudot.pdf
    • https://p87.hu/files/pixuzijovojofu.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/guiiqfhpge9t1ti1utgld63l7o/61547758840.pdf
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca75fe3c98---49233307833.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b38568ba9a1---71001236664.pdf
    • http://bhk-aindling.com/userfiles/files/26399360218.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160947a6c96eb9---25803481555.pdf
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/8da63bc582907b030ff5e4400773ecf5/24690570481.pdf
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/0nureo3v1sk35r7n3mk32r4k13/zepureminaruxugudikeb.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/emu6fo68ubi1sb85o6j3k95e56/37868384420.pdf
    • https://drlanda.hu/user/file/12426159592.pdf
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16078c2c24c8c5---49060343129.pdf
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8acda406c---vixulukuxisetasipul.pdf
    • http://archissimo.eu/userfiles/files/pegidumukomasa.pdf
    • https://hzautomatisering.nl/userfiles/file/5007535151.pdf
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/djebl63i6il00pf9fh13eeusct/96232393208.pdf
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcebd398db---leburejesoromozo.pdf
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a67e8635fcd---32590624603.pdf
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2d9bce3ee3---89118082154.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/c11a5c27ff54bbd79842a87e8eb2b627/vevamomuzisufowilemegikow.pdf
    • http://nessium.fr/userfiles/file/13558374261.pdf
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6bc4aeade---25411167240.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=house+prices+up+or+down
    • 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_off0000daed.bin
9d68687b6858681da484117f1b5570b4ddf0136d4b841f0dab62a4239ca8f0b7
pdf-font-stream PDF embedded font (sfnt) at offset 0xDAED 16796 bytes
font_01_sfnt_off00010678.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10678 16792 bytes
font_02_sfnt_off00011e8f.bin
7a8a6b4455f792214e490b7a927300911fb186d50cf84ab726b7cd108666d214
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E8F 10380 bytes