Malicious PDF — malware analysis report

Static analysis result for SHA-256 0067e9801f56ecb2…

MALICIOUS

PDF

82.7 KB Created: 2021-09-17 07:18:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fa48d081adf5a6d357f900d111e6d942 SHA-1: 3a8ef163cbdaecdab9fadb0cbe07bf430bd456cf SHA-256: 0067e9801f56ecb2fc3649b4e4b758cb0c13e4d9caee2b93f0df2c028069486f
156 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 CMS uploads or disposable hosting, indicating a link farm designed to manipulate search engine results or lead users to malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 https://crewmak.ru/uplcv?utm_term=how+to+create+utility+class+in+android+studio PDF link annotation
    • http://www.hgbehringer.de/img/files/files/tevelazop.pdfIn PDF document text
    • http://likebarcode.com/image/files/20210911_072901.pdfIn PDF document text
    • https://amigo-shop.105h.net/upload/files/66716133842.pdfIn PDF document text
    • http://oiseau-bleu-morzine.com/userfiles/file/23231956083.pdfIn PDF document text
    • http://mh-gartengestaltung.de/userfiles/file/27470910727.pdfIn PDF document text
    • http://heathrowairporttaxi.website/userfiles/file/zapozuzofuruma.pdfIn PDF document text
    • http://a2kat.ru/userfiles/file/46453645312.pdfIn PDF document text
    • https://regiefranchet.fr/userfiles/files/93741079188.pdfIn PDF document text
    • http://mariondhuique-mayer.com/data/file/gamiz.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cd643688d7---lovutanolajubu.pdfIn PDF document text
    • http://cnzhongkui.com/fckeditor/editor/filemanager/connectors/php/uploads/file/050236213973.pdfIn PDF document text
    • https://cobrawire.com/userfiles/files/limoxufutowerixumamuvuvu.pdfIn PDF document text
    • http://sirinthepgroup.com/userfiles/file/5526919075.pdfIn PDF document text
    • https://www.assofmt.org/ckfinder/userfiles/files/26812220532.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613caf99f0482---27445385910.pdfIn PDF document text
    • https://rossbeede.com/userfiles/file/reladagomod.pdfIn PDF document text
    • http://sdes.in/uploads/rozez.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/3a83fd8b34fb7548692b1565450aaeb0/95414527754.pdfIn PDF document text
    • https://connatlas.com/home/conn/public_html/ckfinder/userfiles/files/16582539250.pdfIn PDF document text
    • http://irollee.com/userfiles/file/xufiwabud.pdfIn PDF document text
    • http://aburobocon2019.mnb.mn/uploads/files/guxibomidedid.pdfIn PDF document text
    • http://profitoolinfo.ru/ckfinder/userfiles/files/94745941297.pdfIn PDF document text
    • http://yakutiaprime.ru/SITE/files/editor/file/66161625657.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_off0000d989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD989 19436 bytes
SHA-256: f477243808abe810c4ca3db409d77ee4fbe08c90a1de0f0ec81402db73466a38
font_01_sfnt_off00010cf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF1 10652 bytes
SHA-256: 5e7f204a693b399d657f177cbcc07f5096aaf005ce546858d6efc4315fab5435
font_02_sfnt_off00012576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12576 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1