Malicious PDF — malware analysis report

Static analysis result for SHA-256 074d654be78a9366…

MALICIOUS

PDF

164.4 KB Created: 2021-08-09 11:12:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9433aab4e9ae30dc4633a777e742911b SHA-1: bd31891f90fcf9dc9ddc07aa86ca7c100ac086a8 SHA-256: 074d654be78a9366c74d467947c1b324bc966f983b045a5c2500c6332dbdedbc
216 Risk Score

Malware Insights

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

The sample was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The heuristics also indicate lures for payment redirection and callback phishing, common tactics in business email compromise and tech support scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://cdpu.net/wp-content/plugins/super-forms/uploads/php/files/c4a98708a574823672ecf5611a03d1b6/13940211657.pdf In PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/678d41a7205f29950ec248b52d98f7f1/nipovudipeduxiko.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b80d7a421---dajepewipafuxawiluxok.pdfIn PDF document text
    • http://elma-itc.ru/!upload/files/mudigarodewuzasemavewu.pdfIn PDF document text
    • http://meruzhankhachatryan.com/app/webroot/files/file/jijirutewodudabisixitoju.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/e9983468b93eaca0338d89724cd76a9c/63157717748.pdfIn PDF document text
    • https://bursac.net/userfiles/file/91911130288.pdfIn PDF document text
    • https://propactionvehiclesuk.tv/userfiles/files/7683129305.pdfIn PDF document text
    • http://richfield1960.com/clients/865265/File/danufis.pdfIn PDF document text
    • http://golfproradost.cz/webpagebuilder/ckfinder/userfiles/files/58243944760.pdfIn PDF document text
    • http://ceskylakros.cz/userfiles/file/kuxeri.pdfIn PDF document text
    • https://bikeid.net/ckfinder/userfiles/files/nozawogokelomotas.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16074b8200137a---didex.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/4e501cb6579384de6f84e39adee75cea/soxafodolakivovekuna.pdfIn PDF document text
    • https://banderlogclub.ru/Files/file/791159845.pdfIn PDF document text
    • http://buckleyfamilyofdarling.net/clients/0/01/017bf228c8331327bdfb67b1798bff80/File/55945455381.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160d1d3f1ca785---31540730763.pdfIn PDF document text
    • http://martonelektro.hu/files/file/bevesovexap.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16073d370e49e4---67010190114.pdfIn PDF document text
    • http://istrouma1971.com/clients/9/9b/9b88b062b8d6af44b28e209fcb06d7d5/File/wulodaxojij.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/2b4h774ieeda4lfnm7g1052sr7/lovufiwofesiko.pdfIn PDF document text
    • http://erulingua.hu/uploads/content_files/files/50053531929.pdfIn PDF document text
    • http://falerisztika.hu/tmp/pifejegawa.pdfIn PDF document text
    • http://kxnjl.com/userfiles/files/80621599203.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606fefd9d6b9f---vinovepaxolixitap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=revenue+canada+gst%2Fhst+new+housing+rebate+applicationPDF 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_off000222a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x222A9 11264 bytes
SHA-256: 46effbc00b5f725d1530a61f8845c79da085d1e62aa25bee669e7fb6342deae4
font_01_sfnt_off00023cbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23CBE 17552 bytes
SHA-256: 084cbba213b6d04122048b931f7e2d0847bddfe03c650839a3531152ebd5c1b0
font_02_sfnt_off00026a2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26A2D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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