Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbe224a1000288ef…

MALICIOUS

PDF

55.7 KB Created: 2021-09-03 13:46:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6f15a11aa7f37eb0f1f60e0c57df4f1f SHA-1: 4b0fea8b95363085645d44a37965b3e957e1115c SHA-256: bbe224a1000288ef1efe4e71383efa812ce3155b3f034785771327eda94fb685
154 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 links, many of which point to compromised websites or disposable domains. This behavior is indicative of a link farm designed to distribute phishing content or malware. The ClamAV detection and ML classifier further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9413

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://0975811252cool.linker.tw/files/62939843330.pdf In PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab00a44572---60091526477.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4c33b0c3e6---badezimilodisom.pdfIn PDF document text
    • https://qkon.ca/images/file/gomomowuwe.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6f31c9f53---12988501980.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/ioo8mbusg0okgejott7fhfqn3e/3188506975.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/63711845006.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/bd7c9be670c45b89e4ab8edea5e62f17/24708102427.pdfIn PDF document text
    • http://yingtailong.com/upload/file/210825092838434942zh5hugugbldd.pdfIn PDF document text
    • http://poiskvod.ru/images/file/duzexeromikuta.pdfIn PDF document text
    • https://ymy-tea.tw/upload/files/furot.pdfIn PDF document text
    • http://machinesupplier.cn/data/product/file/2021828_171833_161.pdfIn PDF document text
    • https://carparts-fixture.com/file/file/83435357501.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/kemogumurogobaloxuf.pdfIn PDF document text
    • https://widepolymers.com/userfiles/file/xikoloxuzesamerazono.pdfIn PDF document text
    • https://clickbox.ro/images/file/4652256108.pdfIn PDF document text
    • http://itineraire-consulting.com/ckfinder/userfiles/files/jotilewofupegog.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f4148921ab---pitifo.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/7196713016.pdfIn PDF document text
    • http://asupuro.com/user_data/image//file/3562218485.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/8ab23b69fddafabe623513db9b2b0a7b/31371032640.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/24e7f509de8201cb073ad07256cdf624/86877971631.pdfIn PDF document text
    • http://dentish.ru/ckfinder/userfiles/files/mumupujesafazodazo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=york+aircon+operating+manualPDF 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_off0000b9ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9CE 16836 bytes
SHA-256: 1a0fc28a300447405d10bab6539e2504a279153ffa7518a9a0452473ddb78864

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