Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc37dc847b63f18c…

MALICIOUS

PDF

82.6 KB Created: 2021-08-15 13:54:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ee7d1e0714fda5da09366fbf43c362ff SHA-1: de0af931a84210ae270299e3c0808df53e92bdb7 SHA-256: cc37dc847b63f18c44ecf1147b77219faa3e63001cd2642c6629c55fd5b32d01
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of a callback phishing lure. It contains numerous links to potentially compromised websites and disposable hosting, suggesting an attempt to host malicious content or redirect users. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a malicious intent to deceive users into contacting threat actors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://fipjp.com/userfiles/file/narigigip.pdf In PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/80fd7ef0948a4edab48e628a831b3aa2/rupez.pdfIn PDF document text
    • http://michardardillier.com/ckfinder/userfiles/files/ziwejibanejojafexaruvodit.pdfIn PDF document text
    • http://metaglas.kr/userData/board/file/41729247874.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/52453777e278ee03775c12b773a824f1/14955399154.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/92526208402.pdfIn PDF document text
    • http://slp70.com/clients/873855/File/pasap.pdfIn PDF document text
    • http://f-kcc.jp/user_data/userfiles/files/89004549947.pdfIn PDF document text
    • https://stancijanegrin.com/UserFiles/files/doruzekagirol.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607aefbf30252---82489000915.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/woteviwamovupuluvogujopud.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/15c36fcc9f5efdcc66977716c919b1bf/nozawejofinilisokurivon.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d32f49482ea---linibewozef.pdfIn PDF document text
    • http://beiks.info/public/file/dubadipujixexexibivimu.pdfIn PDF document text
    • http://tincorner.vn/uploads/files/siwoniwaratupu.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/d8d63d1e701934bcb08546bdec7dafa0/43180119112.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/kejazesalupi.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/4cf8b40feb51f31286efdc29a3fe0eed/bisosafaxekositegu.pdfIn PDF document text
    • http://nguoigiupviec99.com/webroot/img/files/fuzetiwusetepadibuv.pdfIn PDF document text
    • https://voyagerf.ru/wp-content/plugins/super-forms/uploads/php/files/35cc0b650c024a85beda3a2dc92c0160/51363912406.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/72e90889ceff025d55d6af844120b8d9/47353242780.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/c05c959a2947a53e15c8bd673a58f40c/sorumaso.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c84be995d62---xezufuvisolux.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/s83b8og7ee9fjqhjrec3hubn7s/sonemapexoxa.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/xazebofum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=princess+protection+program+full+movie+for+freePDF 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_off0000dd14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD14 10988 bytes
SHA-256: 26ade26061dffeb8230af6beae692f73668ce10072b419b333f7c10002e2797d
font_01_sfnt_off0000f6a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A7 17904 bytes
SHA-256: 52069f07ab2c7c2bff5c6b9d7d8e911e3064578dc3a2703c09c56e2e38c030c9
font_02_sfnt_off00012459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12459 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1