Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa716bc8bdff8430…

MALICIOUS

PDF

74.8 KB Created: 2021-09-17 09:55:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ed15b583cf4096403a6dd26e77016fd7 SHA-1: 8b35280cf82f53b147c476369aea7c0a10e4ea89 SHA-256: aa716bc8bdff84305eaef1e7d9561e347588f41af4b5508a70e7105e91799346
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, forming a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple external URIs and a link farm suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 https://laborke.ru/uplcv?utm_term=apk+index+2020 PDF link annotation
    • http://weddingdove.tw/uploads/files/202109132110545443.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16138bc1fa3c6a---92758008512.pdfIn PDF document text
    • http://karinameal.com/imgdish/files/15693200660.pdfIn PDF document text
    • http://www.espace-hotelier.com/ckfinder/userfiles/files/pawakamimep.pdfIn PDF document text
    • https://simorgh.it/uploads/file/52257915750.pdfIn PDF document text
    • https://xn--psg-9lac.hu/files/files/92546563361.pdfIn PDF document text
    • https://www.theknowledgeonline.com/files/lib/ckfinder/userfiles/files/sapinazalinoxuvasisepu.pdfIn PDF document text
    • http://diamantina-joaillerie.com/ckfinder/userfiles/files/lukuvogoxipudanif.pdfIn PDF document text
    • https://xn----7sbbg1ddpkdc.xn--j1amh/uploads/files/75543715807.pdfIn PDF document text
    • http://pokeocncafe.com/uploads/files/wivemekuwimimo.pdfIn PDF document text
    • http://smeeing.com/userfiles/files/wukulefigujusokegatekupux.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1613dcda0dc18d---rozexibipulutatigimifefa.pdfIn PDF document text
    • http://211.129.1.225/system/ckfinder/userfiles/files/79065627793.pdfPDF link annotation
    • http://one9five.com/userfiles/files/pulojomugapudinekexiloki.pdfIn PDF document text
    • https://bliznacite.com/files/24419413251.pdfIn PDF document text
    • http://ekachaiguitarist.com/ckfinder/userfiles/files/difezimegavemonotabato.pdfIn PDF document text
    • https://abicecream.ru/ckfinder/userfiles/files/dakalenekidupew.pdfIn PDF document text
    • http://symbolfoods.com/files/file///zefigabojafivikakavo.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/91e2323cdc9a11f391c7dc46e13d0c11/gawowasizipejimedijo.pdfIn PDF document text
    • http://duplisite.com/userfiles/file/76287133425.pdfIn PDF document text
    • https://shellserva.nl/docs/Image/file/34047796521.pdfIn PDF document text
    • http://glassick.com/userfiles/file/tejifiviruwaxile.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/d6hr1317r2k4e1ag2uq0rdrh6k/59080425049.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612f0b194d621---44549627900.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd7a3bbd98---86886481068.pdfIn PDF document text
    • https://temahr.hr/files/14872616414.pdfIn PDF document text
    • 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_off0000c48e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC48E 10108 bytes
SHA-256: 8f27d61ea954db1ef810b6589b674d159100b1c995c00eec33b4defed87e5226
font_01_sfnt_off0000db3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB3E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF350 16568 bytes
SHA-256: 4673baa59ba6159cebd37c5dccc308ff59bc2422c0e921008a65a01801a4fb6a

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