Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3434fcf62124d9c…

MALICIOUS

PDF

81.6 KB Created: 2021-08-13 11:15:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e96c1f0914dc5a80b04b8bcd0578a280 SHA-1: 24ad1c86226787d0734fa9caf648060a1c7f5677 SHA-256: b3434fcf62124d9c6121fed1c59d7ad3ffe155086438b3c66034b39dc4a1916e
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that point to compromised WordPress sites, likely to lure users into downloading further malware or engaging in phishing activities. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1608697cd6355e---fufalufetivozu.pdf In PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16098beb469349---74203200266.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/16086300234baf---46860829040.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe7aaab738---63933932012.pdfIn PDF document text
    • http://obasekiestates.com/UserFiles/file/53510969831.pdfIn PDF document text
    • https://unosms.us/userfiles/file/47376712359.pdfIn PDF document text
    • http://kimyasaldubeller.com/upload/ckfinder/files/90010246544.pdfIn PDF document text
    • http://primebrokeragetx.com/ckfinder/userfiles/files/15830936963.pdfIn PDF document text
    • https://pacantioquia.org/aym_image/files/91065169802.pdfIn PDF document text
    • http://bodymindspiritconnection.org/clients/5/53/53f1eac0d8ee32431a47b4e1af774f29/File/tanusok.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/xazitatat.pdfIn PDF document text
    • https://creativitagh.com/pevron/www/img/file/lekedera.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/wiruzep.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607447832ebf3---sumuwivovive.pdfIn PDF document text
    • https://infrastone.com/userfiles/files/97285641326.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/tevuxidowuwa.pdfIn PDF document text
    • http://chocoenglish.com/_UploadFile/Images/file/81730968790.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b1525807e2e---31859637392.pdfIn PDF document text
    • http://inter-travel.hu/_user/file/35752281924.pdfIn PDF document text
    • https://marathonroller.com/userfiles/files/40292170724.pdfIn PDF document text
    • http://solemarservizi.it/userfiles/files/42881528414.pdfIn PDF document text
    • http://one9five.com/userfiles/files/pipuzisilodek.pdfIn PDF document text
    • http://hasici-pristroje-eshop.cz/files/file/guzedarox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=pokemon+omega+red+gba+free+downloadPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c43a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC43A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dc51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC51 10660 bytes
SHA-256: 363ea555840776a14d99006605f2687363138b8868d31ac87e61096d409fab07
font_02_sfnt_off0000f490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF490 16060 bytes
SHA-256: 1d307fdc968eef174227f41984dd0857c7e384e9a7a6083ef7dc74c80970da6b
font_03_sfnt_off00010998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10998 17244 bytes
SHA-256: 582226a5481f95445c7a9905245497ad3a66b315dc7017ac34a7b58d614f1f52

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