Malicious PDF — malware analysis report

Static analysis result for SHA-256 bae49ee15460889d…

MALICIOUS

PDF

92.6 KB Created: 2021-09-15 19:56:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 38628390eb91c25aad63ba7d7e2b0cb1 SHA-1: 6d840e717301666f161f67ed5b14aae21ef9262d SHA-256: bae49ee15460889db27954e27411447d7ddafc81d1542941a87406879cbd880b
196 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised websites, many of which host other PDFs. The 'SE_PAYMENT_REDIRECT_LURE' heuristic indicates a pattern of redirecting users to fake payment or bank detail change pages. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or financial fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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 http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/utbjm3fffr882esdfh44mfvnq3/wurasojowivogupuxuf.pdf
    • http://vinabomi.com/uploads/userfiles/file/guvivonobebosu.pdf
    • https://bakwanudang.com/contents/files/14006238875.pdf
    • http://www.findvoters.com/userfiles/file/sogexagotiwomopab.pdf
    • http://erpsamik.com/ckfinder/userfiles/files/fetuvajod.pdf
    • http://otoozevran.com/resimler/files/fuzexirubupotuvevotuxolo.pdf
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131fdaa1becd---17796493829.pdf
    • http://hanmih.com/userfiles/file/20210913095536.pdf
    • http://myxroad.net/upload/userfiles/file///lugeguf.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c97bec09bb---49480092867.pdf
    • http://acm-medicali.it/userfiles/files/23379313500.pdf
    • https://7mark3t2-7aya.com/contents/files/72145712313.pdf
    • https://hotelpancharatna.com/assets/userfiles/files/pepisalexusulerazomulunas.pdf
    • http://ensky-chemical.com/upload/files/lijin.pdf
    • https://red-adlay.com/upload/files/294805083.pdf
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/mubibejerikopaguwurol.pdf
    • https://barrier.exma.cl/ckfinder/userfiles/files/64781792740.pdf
    • http://szermgrt.hu/uploads/ckfinder/userfiles/files/semuwalurilizowijewiz.pdf
    • https://kakakmanis.com/contents/files/naxusikuzis.pdf
    • https://majubesar.info/contents/files/mogexufiweno.pdf
    • https://iphone-odklep.si/vsebina/totelebofejejotiwax.pdf
    • http://queenart.kr/userData/board/file/68380906447.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/ad59a1578e22290ec447905847227023/93105930776.pdf
    • https://pepinieramontana.ro/ckfinder/userfiles/files/xapawu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=fortnite+for+android+epic+games
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001054d.bin
2885834f0b1a57595b641245af2cf9bc58c6a6a991f13abc759972fbcf9ef11c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1054D 10892 bytes
font_01_sfnt_off00011e3c.bin
113ff7fbe815637de57f563b350e9c58ce15d299e75230ca81b8d00818415ad3
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E3C 17908 bytes
font_02_sfnt_off00014cbd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14CBD 16792 bytes