Malicious PDF — malware analysis report

Static analysis result for SHA-256 84969ffe547faa47…

MALICIOUS

PDF

79.8 KB Created: 2021-09-09 06:49:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f418c33b4ca0767b21a41b012395dba5 SHA-1: 1dafecc076da71a3904221dbe7925bbc150ce69d SHA-256: 84969ffe547faa47425736ad058244c64493cf1e1a95e59cdb45cfc78432327a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple compromised or disposable hosting sites, likely for phishing or malware distribution. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest this is a phishing lure or a distribution point for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://coretry.ru/uplcv?utm_term=pes+2019+file+for+ppsspp PDF link annotation
    • http://csc0512.com/userfiles/file/20210908155614_a0bl8m.pdfIn PDF document text
    • http://pereplanirovkaoblast.ru/pict/file/40021822081.pdfIn PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.com/ckfinder/userfiles/files/53344792091.pdfIn PDF document text
    • https://www.shipgo17.com/plugin/ckeditor/ckfinder/userfiles/files/90135938225.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613366d1b45e2---pamazaponelomujuxe.pdfIn PDF document text
    • http://bike-aholic.com/UserFiles/file/vevabezokomusidologenaw.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613978eeb8668---kebijatotuwejotemed.pdfIn PDF document text
    • http://studioarclab.eu/userfiles/files/398609505.pdfIn PDF document text
    • http://honeycontacts.com/uploades/userfiles/file/dabururalesep.pdfIn PDF document text
    • https://pmapmc.com/userfiles/image/files/lisoruwiwamigatupano.pdfIn PDF document text
    • http://kayamedbursa.com/userfiles/file/64694963854.pdfIn PDF document text
    • https://xyoaa.org/sites/default/files/files/nagagej.pdfIn PDF document text
    • https://artcorner-fiberglass.com/userfiles/files/nibeja.pdfIn PDF document text
    • https://italvaping.com/file/95693276223.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/ribitovomag.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/4ea29361e66eddbddf04b6dde0b400e0/22163012308.pdfIn PDF document text
    • http://digitalqwerty.com/ckfinder/userfiles/files/letozugugupijefafitoloz.pdfIn PDF document text
    • https://softwebstar.com/shop/userfiles/file/18697452426.pdfIn PDF document text
    • https://aildf.in/userfiles/file/jurevulufatakukewedi.pdfIn PDF document text
    • http://umbabox.com/userfiles/file/tewobifukamuluvefito.pdfIn PDF document text
    • https://er-cardiff.com/eurostyl/photos/file/95658221965.pdfIn PDF document text
    • http://apartmany.cucoriedka.sk/data/files/13405003873.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/83044899505.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_off0000d253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD253 10448 bytes
SHA-256: d3fdc239e9f65fc9e044d6203613db4204e62cb98ea4d657d23f592617e3c513
font_01_sfnt_off0000ea34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA34 18288 bytes
SHA-256: c9d51ce1f9bc817cc5533c7d3e2adddc83f74cd2586c369c8fb93447d308aa0d
font_02_sfnt_off00011a00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A00 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1