Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0e990dda515698d…

MALICIOUS

PDF

109.3 KB Created: 2021-07-03 23:52:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 7e80935bca2e9d954f6f8d6d16697575 SHA-1: abcc6ff1a32a64fc24c0f1df5c3e555e94bf89a8 SHA-256: f0e990dda515698df8108fb4dfba563f6522a76cda34cc802f0a6854f2be1474
176 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The 'SE_CALLBACK_LURE' heuristic further supports a phishing pretext, aiming to trick users into interacting with malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/a6a77cff2954ef70ee048f88c84aa833/xiwugunekagazemelikat.pdf In PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ae71c5c2073---gilalosap.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/88532a4ff031294f220bffdac4f64c89/35768733187.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/5lm37m76cr4qdeqd3cgkr9n2jq/girapiguviluzemoworutelil.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/e4e31c34cec2b5f731db8ac036ad8c99/81310604973.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c47d7ead4---dazigenulepovo.pdfIn PDF document text
    • http://otvorene-srdce.sk/userfiles/file/10080229254.pdfIn PDF document text
    • http://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/74661369264.pdfIn PDF document text
    • http://imssp.by/data/images/fxeditor/file/50074137657.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607480283bc21---morozetabesanifit.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9485c4941---83337568519.pdfIn PDF document text
    • http://benedictinoselrosal.org/ckfinder/userfiles/files/kogapuwukimerijupixawu.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/d3d7d9aa48135a6c388dd7c81ae358f2/bekumezoravajuwanarix.pdfIn PDF document text
    • https://kraftyz.in/ckfinder/userfiles/files/1463214236.pdfIn PDF document text
    • https://ytdrive.com/CKEdit/upload/files/51240553223.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/8709f0c6aa06ddc7a06af0b5576e1ded/gabusunovetimolimozosizi.pdfIn PDF document text
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/834f9fb0e95fab2060a8d5023b05ebdf/24214198738.pdfIn PDF document text
    • http://mayamalay.com/clients/874202/File/59279860602.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/812d62d46eb56b14815164c201b9a93c/guvajomuwiwamegajumujelo.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/aecb23f90ca5b6353c2aa5c7937bc8e8/67260617525.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=checkers+mall+of+the+southPDF 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_off00014938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14938 17560 bytes
SHA-256: b07deeb1a296e3e49e6f2f8bd86eba3f3f11992c72c5defa8f8650af07758107
font_01_sfnt_off00017729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17729 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00018f40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F40 10628 bytes
SHA-256: ced89a02a2de4b7f8e5a30ac8eadd88da107e7d6db79b7bc1a0c8fa863730c3c

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