Malicious PDF — malware analysis report

Static analysis result for SHA-256 46db303fa571926b…

MALICIOUS

PDF

76.0 KB Created: 2021-08-22 01:31:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a184f8c24061ea3bc57d2aef591f0eea SHA-1: fe6b9bf0d854041ef5929c63171aec8c52f8f9c7 SHA-256: 46db303fa571926b98b67e06369c4cd09b1f79b66048a5f8b620f82309532c6f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories and other disposable hosting. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://ivepe-elearning.gr/assets/UserFiles/mainHome/file/1301429167.pdf In PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/fbcf204f2413ca18acfa8079b99dfe1d/43223826558.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/93e7d58d15ffdfbafed49382f801fbdb/wikasufetuvizoji.pdfIn PDF document text
    • http://nccutrackandfieldalumniandfriends.com/clients/2/2c/2cea5a7e730406ee40dfbbde6098010c/File/12955187377.pdfIn PDF document text
    • http://nappsa.org/userfiles/file/lemon.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/f834cc6bfe920e6d00dae9939bdfe5dc/nitiw.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16087856b888c8---40516987698.pdfIn PDF document text
    • https://cleaner.pl/userfiles/file/14459669171.pdfIn PDF document text
    • http://saovietgroup.com/upload/FCK/file/87542075535.pdfIn PDF document text
    • https://accu-split.com/userfiles/files/rigibesulege.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/f6dcd943563607d6ad57ea7bafa5714f/31330461764.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/besatefebawulo.pdfIn PDF document text
    • http://krasneclanky.cz/uploads/57678691598.pdfIn PDF document text
    • https://twfern.org/upload/ckfinder_temp/files/20210628042254.pdfIn PDF document text
    • http://hoshitorionline.com/uploads/files/vajodujubigureza.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160943fbbdad36---widonidixudezojifozelaw.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/cn5d6bvdj524ou19ftqole2cl6/40882390188.pdfIn PDF document text
    • http://hattingtoemrerogsnedker.dk/userfiles/file/wedekepuxegexetisudalupo.pdfIn PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/21071683063.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db16ccdccc3---zalizikadijoronevozajok.pdfIn PDF document text
    • http://orikon.net/Images_upload/files/66968097988.pdfIn PDF document text
    • https://tskrea.com/userfiles/file/piboleduwi.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16083f6ee861a7---70786894896.pdfIn PDF document text
    • http://mcutech.net/upload/2021/07/file/1625198474689464941.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8cdb1e67c---64058433242.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+check+my+aadhaar+card+address+change+statusPDF 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_off0000c77a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC77A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000df91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF91 11060 bytes
SHA-256: f41c9e947db008362f8ff798a640d12fce9e8fa602370cd1c1959cb06db0443e
font_02_sfnt_off0000f902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF902 15548 bytes
SHA-256: 33fec3c87d0cdb1b9b472e9fa641dadc000f75e62065136f9321c3270d68c3c4