Malicious PDF — malware analysis report

Static analysis result for SHA-256 267316857a610b19…

MALICIOUS

PDF

77.6 KB Created: 2021-06-27 00:00:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 706cf1e90a46a13bb02edb18b2081875 SHA-1: 71b51a106603329cf81ff73fb7486ea6924fb2d8 SHA-256: 267316857a610b19c435dba521d7f5d30e071af22d91d1c7bcad1633b5141f3c
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting it's designed to redirect users to malicious content. The file's structure and the presence of a link farm indicate a probable phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://nomylo.ru/uplcv?utm_term=project+planning+and+control+with+pert+and+cpm+by+punmia+pdf+download
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d4c6c57a9---rutiram.pdf
    • http://boeschfamilytravels.com/clients/43210/File/gafelexazulemagonitudug.pdf
    • http://mywayrtk.info/userfiles/file/kopezebenasob.pdf
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/3dcdkkneql9p3vdajm117s8b22/pegob.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a70624f1c1e---gibodabu.pdf
    • http://hysansam.com/fckeditor/userfiles/image/70284225561.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082b4a06a6c7---xuvubosilikizumemujawu.pdf
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/n2to6dkjet0k33ptqve6qalum0/26067503397.pdf
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/demasu.pdf
    • http://classicalgardenornaments.com/uplds/file/84554693741.pdf
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/779e75600094edba073e891fe467c80d/98841100564.pdf
    • http://soles2walk.cz/data/file/xalamajepo.pdf
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/b2c9208e8814081225acb2a42a12d263/126680609.pdf
    • https://alves.bg/ckfinder/userfiles/files/16207876337.pdf
    • http://anandamsanyal.com/userfiles/file/28407215004.pdf
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/6135946ca445c68f1ffea73538addd52/62398875418.pdf
    • http://www.heksan.com.pl/file/lowekovazopegow.pdf
    • https://aedwea.com/upload/foto/18646928849.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160b79e6ca1aad---kaliw.pdf
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/432e5bf6a5dd1272fbca07fc7bc1ca98/sotuxufixo.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c214596a10---89651441674.pdf
    • https://ludifrance.fr/userfiles/file/36625378875.pdf
    • https://xn--fct8ml6mwue.tw/uploads/files/40780348711.pdf
    • https://tavio.ru/files/file/2856351474.pdf
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/2f9db2805b919c2d61869fac50b26d30/lizafad.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_off0000c97a.bin
b1e065a99c6d1b80bca85a71d4def7394490827fda9bd3ef8bea88b781eae69c
pdf-font-stream PDF embedded font (sfnt) at offset 0xC97A 16888 bytes
font_01_sfnt_off0000f5c9.bin
442d30fe941aec25147196cd2ba79211b83e34c76699fc3a5c6a6407c03cdfb0
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C9 11468 bytes
font_02_sfnt_off0001104f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1104F 16792 bytes