Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b08dc5a6e76560b…

MALICIOUS

PDF

77.4 KB Created: 2021-09-05 23:24:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c0f7837517983b106b4948b4366742f0 SHA-1: 4bcf08c90dc8b785a60e0b8dec9c3b5287cd1f4a SHA-256: 1b08dc5a6e76560b34432ad343234704be9a8f5ab0ac6843fec9d8b7e5263c08
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL analysis point to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • 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
  • 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://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/f83rpj1eo32m1h1390f2c2jd93/3587286851.pdf In PDF document text
    • https://evpersoneli.net/ev-personeli/file/45814696037.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/3519508973.pdfIn PDF document text
    • https://combrooncom.com/contents//files/4401050915.pdfIn PDF document text
    • http://mikllc.mn/uploads/files/93279200943.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a32db87b26e---84967491065.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/8a4f6a412aeb068f015f5cef1321be93/10958321704.pdfIn PDF document text
    • https://sibconsulting.com/contents//files/94481089165.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/htgtr2thgfb4m0rjvt8a163qp8/dipilegalotibowar.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a31c9c35608---devibiwonunomogajanaxa.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16098555623859---boselajiti.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/tefevojezidizogujagal.pdfIn PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/93676016400.pdfIn PDF document text
    • https://apexsafetyproducts.com/ckfinder/userfiles/files/63359935753.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/14dcec7d67564f2b50aedb51df125af8/14060731788.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e81ecb2ef1b---51758360628.pdfIn PDF document text
    • http://debschoen.com/userfiles/file/jajifegijotibujelofepuf.pdfIn PDF document text
    • https://vroa.pl/chplusfiles/file/mukinewilaragewezojam.pdfIn PDF document text
    • http://sunarfactory.com/userfiles/files/48002051996.pdfIn PDF document text
    • http://fosterfreezesantarosa.com/uploads/files/wafutokonikizewigopelu.pdfIn PDF document text
    • http://kondicionery-noginsk.ru/upload_picture/file/bejixadedixeba.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab6d6544e4---30906147783.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c4c6b9aa68e---fisapirax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=distance+formula+worksheet+answers+mathworksheets4kidsPDF 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_off0000c78b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC78B 11096 bytes
SHA-256: fed70af578ba90fe897f331c539967636bae80990a9c79d2d5805a33b91da9fa
font_01_sfnt_off0000e151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE151 17836 bytes
SHA-256: 4b29fe4af9329397b919b9abfa2dcf0ff1315e06c3771e749afac27fbfce7d37
font_02_sfnt_off00010fc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.