Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5edf2a81cd4900b…

MALICIOUS

PDF

83.2 KB Created: 2021-09-01 06:36:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: dadd1b1933dc976b9bc912870443ad3e SHA-1: 55beaf83751f4defda528e3f442ca1c3e6eb230f SHA-256: e5edf2a81cd4900b7b94273c9eaf084ee7077b2496d38348110701070368e738
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised CMS uploads. The primary purpose appears to be redirecting users to potentially malicious or phishing sites, aligning with the characteristics of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7998

Heuristics 5

  • 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
  • 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://ototavandosemesi.com/resimler/file/65617028847.pdf In PDF document text
    • http://qiangka.com/ckfinder/userfiles/files/jepid.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/53612551127.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/66758730125.pdfIn PDF document text
    • http://architettotamborra.eu/userfiles/files/tekuwuwavo.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608be45228c0f---pepuwubika.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/0j85rbu9uup2u1hu5q9g7q8o1s/48525760964.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/d549be1b0253eb172fc48451d94a194d/31472345169.pdfIn PDF document text
    • http://xn--9d0b102a6wc3y4a.com/sa_upload/userfiles/file/20210629140528.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c79957d2893---lijowezozofolibudes.pdfIn PDF document text
    • https://stpeterscbs.ca/ckfinder/userfiles/files/77014104362.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a9109ab82---gutasabafej.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/81v2igu1gqd3olv3hq6fkougih/sunufubusomom.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c5d74da71ee---kizozifofemoje.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611173b93ccde---lupoxafukiwuzowisuk.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/dodojaduxalavijas.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb7127722d---sugiwidiluwerutisenana.pdfIn PDF document text
    • https://schlosshotel-murten.ch/userfiles/files/85299860558.pdfIn PDF document text
    • http://hollywoodterrace.org/clients/863344/File/tomefokixi.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6b097baeed---50365195519.pdfIn PDF document text
    • https://fishboat.hr/files/vogorerizemafugatibupag.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/l364udp7ilaff1nd375goanljc/fabelavawipe.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160839ca6f11a3---lubafaritifoxabofewogu.pdfIn PDF document text
    • http://nesthomes.in/userfiles/file/jatijeril.pdfIn PDF document text
    • http://bfttacg.marketsearching.com/upload/files/gamobujafenu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=yeast+in+the+airPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12818 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1