Malicious PDF — malware analysis report

Static analysis result for SHA-256 064e308207e42b42…

MALICIOUS

PDF

88.6 KB Created: 2021-08-14 00:14:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 907a1e1202278a30264fc08a12fd9a2b SHA-1: ffcdd670da46177cfcdaaec68de87dd629c58f84 SHA-256: 064e308207e42b42f46cbf9b6b05e692ee9fb93648544407c43d5de08a4aaa97
156 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a link farm pointing to numerous domains, many of which are hosted on compromised CMS uploads or disposable hosting, suggesting an attempt to distribute malicious content or phish users. No scripts were extracted, and the document body was unreadable, but the heuristic firings strongly indicate a malicious link distribution pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://mingyi-lock.com/data/file/userfiles/files/legesim.pdf
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/c2825827bd2776d2960647789375e5d1/74999536726.pdf
    • http://lhs1965.com/clients/880801/File/24454036440.pdf
    • https://pacpartner.net/images_client//imagesfile/38962122732.pdf
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cce995e4e02---25667904471.pdf
    • http://artechq8.com/beta/uploads/files/7205650364.pdf
    • http://yunnanyingxiang.com/ckfinder/userfiles/files/10427342876.pdf
    • http://alexlunacoach.com/img/editor/file/20672645545.pdf
    • https://addsfly.com/userfiles/file/30137785685.pdf
    • https://agmatbaa.com/upload/files/91949911770.pdf
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/92482efa0ba15aa2541af05327104e56/59186537588.pdf
    • https://alarrabnews.com/images/content/content/file/8031498787.pdf
    • http://elandtour.com/FileData/ckfinder/files/20210813_21E08A2D96CB74B8.pdf
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a28ba81e4f7---moxuta.pdf
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec9bfc7ea3---46556863695.pdf
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160716d453d4b1---welejajupemejoku.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f25c4c6cb2---26355598453.pdf
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abdedb0c47d---fagel.pdf
    • https://zippy-inc.com/app/webroot/userfiles/files/debipuzosepamaku.pdf
    • https://gtselect.fr/ckfinder/userfiles/files/93980814283.pdf
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/a2174e1a157a721ce4a80aa1fffee981/galiwiwojumi.pdf
    • http://avtokapriz42.ru/userfiles/file/83282393668.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16097b0f5ecb26---13366378777.pdf
    • http://aiswaryamatrimonials.com/fck_uploads/file/saxitunemifolakuje.pdf
    • https://slide-bearing.com/d/files/fosodoparudaxuv.pdf
    • http://unipsyclinic.com/userfiles/file/20210807100333.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=gre+physics+practice+test+with+solutions+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f48f.bin
5de5c645b88d9f47095b5a2c0a613a40a6c8938e36d39206bcd24b24344ef062
pdf-font-stream PDF embedded font (sfnt) at offset 0xF48F 11056 bytes
font_01_sfnt_off00010e55.bin
17d88f1b5160a380bfe525ff2fa90c6759399d9e548d062d08cdb850bd0b94f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E55 17684 bytes
font_02_sfnt_off00013c49.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13C49 16792 bytes