Malicious PDF — malware analysis report

Static analysis result for SHA-256 8720560e5c34aa33…

MALICIOUS

PDF

87.3 KB Created: 2021-06-27 08:16:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8bc07217bb4336189d1f63d814fce9e0 SHA-1: 8700db8dabfe4caf2ed05b54122f081474dedd72 SHA-256: 8720560e5c34aa3374cb6b7ecf1c457d2b25cfd5c71f4c5356f9b81dcef528ac
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a large number of external URIs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The document's structure suggests it is designed to lure users into clicking these links, which likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/3s7957jk595hv7ceqq6fuop16c/sititovurezelad.pdf
    • http://windowsplusllc.com/ckfinder/userfiles/files/4843306164.pdf
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/16076f50733832---jujanoruvuxuxopitime.pdf
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16079648d7f7d9---87514216648.pdf
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/sc1b8hhj859gib60cvqt23po1v/gemotuxurenip.pdf
    • http://aimic.com/userfiles/file/favafasidi.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607704b4b58e3---wudowukawetado.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e5206ed8d---57388652101.pdf
    • http://wurbs-hanau.de/userfiles/file/xonaviwadotexovokenofad.pdf
    • http://thegreenlegacykeepers.com/clients/e/e8/e8dc17949b7ef813e9937e453902477f/File/texuxanodavunisezuw.pdf
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/56d8c4d0c06260d4f2a9c503ee50f61c/xijixekalabawiruvibude.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095067c1b07d---sefufowifasubuven.pdf
    • http://nappsa.org/userfiles/file/paradetupuveze.pdf
    • http://schodylux.pl/userfiles/file/22962216608.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091ecb64cc0e---junix.pdf
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/aee5b4c2c7e279418cebde3bfe8957ec/depazonaginajuwurugufaj.pdf
    • http://majorpropertygroup.com/userfiles/files/64078755197.pdf
    • http://jirehenl.com/userfiles/file/281450183211.pdf
    • https://hasekei.jp/userfiles/file/jivoluxos.pdf
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/16093d01c12947---losimogi.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160988ca97ad80---19120935319.pdf
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/6057da38dd9ad30392677eb7c1aaafba/8224881442.pdf
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/c4v5g7uba9eflubmr43shhvb51/36191453344.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=sketching+from+the+imagination+an+insight+into+creative+drawing+pdf
    • 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_off0000eddb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDB 16792 bytes
font_01_sfnt_off000105f2.bin
50e811f081399bcba36d8b0321dd14058d86961f3b5f5725d6155de64c7bf4ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x105F2 11340 bytes
font_02_sfnt_off0001205d.bin
96f4b537204fb9b407768b98e660cf1c0bc775888dc9caaf397018b173eadb9a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1205D 17324 bytes