Malicious PDF — malware analysis report

Static analysis result for SHA-256 3523b3088b6422da…

MALICIOUS

PDF

103.8 KB Created: 2021-08-05 07:42:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9c743aade95917adb84ca6c6bade4a27 SHA-1: c87bbe4d56a515a81b3a65a9ecb27e8e9810ec7e SHA-256: 3523b3088b6422da452c45e3b6ea845fd6ffe43212fca81c6ffc99aea2480efb
176 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier. Heuristics indicate it functions as a link farm, directing users to compromised WordPress uploads and other potentially malicious sites. The 'SE_CALLBACK_LURE' heuristic suggests a phishing or tech-support scam pretext, aiming to trick users into interacting with malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/es4pkmb9bp2jimenffbbnare5q/tesuwavubarakonefub.pdf In PDF document text
    • http://sporteambiente.it/ckfinder/userfiles/files/gafori.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/6f740fa6bc4e3088f0fd7292192e443c/tobugaluwu.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/4ac079b64830cdd0925200967a5d3c1a/rasupuxuki.pdfIn PDF document text
    • http://unicaconsultoriarh.com/images/files/9161219609.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/3e81a0787d58cb2b5e3ca0ff4b6fc684/13311288992.pdfIn PDF document text
    • https://www.mds-horizons.com/upload/files/54277370976.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/52039300034.pdfIn PDF document text
    • https://noddy.nu/images/file/38920253887.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/94666583283.pdfIn PDF document text
    • https://tatsolarlight.com/uploads/files/1997016873.pdfIn PDF document text
    • http://canvangdientu.com/images/file/lanepumabefijo.pdfIn PDF document text
    • http://sharon-barron.com/userfiles/files/ribipivekunuzevetivawuvi.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/e3e465743d16f41f613bbb7927001314/sodulufojusan.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/xekupajuxiwi.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea99d2b8f8---35562214822.pdfIn PDF document text
    • https://travellifeafrica.com/ci/userfiles/files/42955962879.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/16085c742bc2a2---dudedidebowumo.pdfIn PDF document text
    • http://tunesistudio.eu/userfiles/files/xidin.pdfIn PDF document text
    • http://elskup.pl/images/assets/file/78419449922.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16095c08460c7e---84750402120.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb86303557---tizexunuvijimifu.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/98233840440.pdfIn PDF document text
    • http://sanitaerprofi.ch/fckeditor/editor/images/file/bowoge.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=oxford+english+portuguese+dictionary+pdf+downloadPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D76 2140 bytes
SHA-256: 85b3e3101fa4c2ecaca959458a77b60b2b920f86c93e8ced6599179c9a2c82be
font_01_sfnt_off000116fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F11 11328 bytes
SHA-256: 95ecd4eabfca9b465c53b72c6d24fd6fdacc39f6a06a8dafd94d9b42d701d1c7
font_03_sfnt_off00014987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14987 16144 bytes
SHA-256: fcca37035df06e555c2991ff65faa0e8497ca6423bee408ebc46b3aef925b516
font_04_sfnt_off00015f02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F02 18368 bytes
SHA-256: b453f46b1f4a9ec489f12cb57f50eb6c9dccb43e74f25931bcd4988977423202

Open this report in the interactive analyzer, or submit your own file for analysis.