Malicious PDF — malware analysis report

Static analysis result for SHA-256 dafd35ede432dafe…

MALICIOUS

PDF

84.6 KB Created: 2021-07-20 13:04:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: be43e6e08c79f0045a4511d6dbeb5e17 SHA-1: 6f6542dc1d25652e20a0499e372f33b34095a3b6 SHA-256: dafd35ede432dafe8b7782a092f4d88e0b602814093525db3090d8eaee96308e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://asfalon.com/__files/file/74159541786.pdf In PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/959lmb0mo3463jdj8q7fcumod8/wofafinuvesaxapisudun.pdfIn PDF document text
    • https://igruppe.no/ckfinder/userfiles//files/92589406609.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/ce9a1ed4c2e4aa2b6f74ae3fc47a3a9a/85047146839.pdfIn PDF document text
    • https://agatanorek.com/files/file/tivaratuvikurizetikej.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/b60cbfd8eb2d678ae40ce95e7236febd/25963142547.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/eom6te6te42d4qji3u4veo7g42/4949420080.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/huqtd7234i4ln1o133sgro63f7/dakakifeduvep.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/76e3d07a4f3c298400283cddc62206e3/xikavosepuzudumakel.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d0667742cd5---65051934838.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bb9f2171516---tilesut.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/7815019b6512cf53f395aa65b7575986/numinezabakunaj.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e140ea935e7---29473300840.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/0c5fdfe2e9fa0b5e06034b0a669ff1a6/6555622164.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/9b1a7541abbc4c51d44686a73a57e52b/49384875036.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160903fec6328d---4495459016.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/jejpbcresbi6olkerev3a4u880/29040513815.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc5a402002---70770014131.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/frv4dt50rel1nu2lc4s7n56b9u/femuniponirox.pdfIn PDF document text
    • https://n-zvuk.ru/upload/file/5555268841.pdfIn PDF document text
    • http://www.bash.cl/media/file/46314853195.pdfIn PDF document text
    • https://binhvi.com/upload/files/xizipit.pdfIn PDF document text
    • https://budapestpainter.hu/ckfinder/userfiles/files/nanuj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=upper+and+lower+jaw+bonesPDF 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_off0000ea95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA95 16328 bytes
SHA-256: 4d923e6e4f07a669814b8d7085c6ca420befafe9c0f2843982ba7616cfe02982
font_01_sfnt_off00011520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11520 10556 bytes
SHA-256: ec4010f5ef604b831552d3346fed67b3a4ed35831c59e26902b77d927373224a
font_02_sfnt_off00012d1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1