Malicious PDF — malware analysis report

Static analysis result for SHA-256 2496f86ee1f83b3c…

MALICIOUS

PDF

84.2 KB Created: 2021-08-25 08:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4537ca4001b865593a2a3bc9f9893a24 SHA-1: 356cb7b81dd7eabd89e75ba012b5ea506977a285 SHA-256: 2496f86ee1f83b3ce5db426cd069e6e78f66a5e5db77420c6b2ebbebddba1bfb
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised websites, many of which host files within formcraft plugin upload directories. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to download an archive and provides a password, a common tactic to bypass gateway security. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. No scripts were extracted, but the overall pattern suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4ca45b8ec3---bizami.pdf In PDF document text
    • http://appletechsolutions.com/userfiles/file/34845454747.pdfIn PDF document text
    • https://avenue102.com/uploads/file/96685000830.pdfIn PDF document text
    • https://bestrecycledautoparts.net/images_i/file/71033610850.pdfIn PDF document text
    • http://nail-free.com/ckfinder/userfiles/files/godexig.pdfIn PDF document text
    • http://mabifitness.it/userfiles/files/43438491819.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a2af2db3d53---53452782476.pdfIn PDF document text
    • http://gintaras.cz/userfiles/file/94072690045.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c208efb0c78---vadifege.pdfIn PDF document text
    • http://wowbond.com/upload/Fckeditor/file/vodifarodare.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160b85ea0f0103---fatapugadi.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/9148eac1c8de45878e37962b538446c4/45451569506.pdfIn PDF document text
    • http://www.frank-diagn.hu/userfiles/files/91531506261.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160aa35dc22e2b---merefuvuboradimo.pdfIn PDF document text
    • http://togetherwewalkny.org/clients/2/24/2411cc079aa0f0d7fd57f81c6163ecfd/File/11471376812.pdfIn PDF document text
    • http://bienbao.org/uploads/files/sovusebona.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/2620696001996a4d4e0240c69a94ac88/negatodoleverewufifufiri.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/50635910932.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16077b004c5e30---dokuxavebafex.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/gavezirudadudasex.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/xezudidu.pdfIn PDF document text
    • http://teusz.pl/UserFiles/file/sezefimipoxafupaj.pdfIn PDF document text
    • http://duonglaohanoi.com/userfiles/file/35649281233.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/80b765912d10cc1b9e77b2ff3458cdcd/mekifatugemopalivifegino.pdfIn PDF document text
    • http://zenobiacultura.it/userfiles/file///46430434550.pdfIn PDF document text
    • http://www.lugashotel.com/data/editorfile/sanab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=stand+by+me+stephen+king+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE365 11100 bytes
SHA-256: 73a71e955d79db76ccc924202e99625b14d3180fb7c046705b325f5a18e9af99
font_01_sfnt_off0000fcb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000114c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C9 18092 bytes
SHA-256: 67cf72fc0f7659ef2fff1898cb18a2b371c80393c4e9b694ea70f298500df2f1