Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d38f743ef68b1ee…

MALICIOUS

PDF

89.0 KB Created: 2021-07-06 11:13:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2455312b2d377a26aea24cc75f6c3439 SHA-1: 557dc3d431f8d2e1872fe8799a52380b23383fe8 SHA-256: 0d38f743ef68b1eed9ce1b967fa09339591ecc18dea7da3ca3a35f10534f2470
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites, likely to lure users into clicking malicious links. The presence of multiple distinct hosts and the use of UTM parameters suggest a coordinated effort to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://chcial.ru/uplcv?utm_term=maslow%27s+hierarchy+of+needs+social PDF link annotation
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/esbcg8lqagv1skqkabm14mhec5/12749390168.pdfIn PDF document text
    • http://de-ko-gmbh.com/ckfinder/userfiles/files/jogemamotamalejuvidigel.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ffb16c868---73767924678.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/91bb0208be319e9cc1cd5804e64bb68a/xogadojuluwapilog.pdfIn PDF document text
    • https://agroadvanced.com/app/webroot/newsletters/editor/files/65923014708.pdfIn PDF document text
    • https://torgradio.ru/new/files/file/nilixude.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/958c7e6f1b5d88ad3122422ab85d0105/38719098112.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/m6hq332vhu51ak0i4lcc1mce17/bivopunopokasorotu.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/jalonea4k5iu9v96mm3ufimat6/futojagotizus.pdfIn PDF document text
    • http://donghotam.com/luutru/files/77465082398.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/34298595420.pdfIn PDF document text
    • https://bustotoronto.com/userfiles/file/45817112474.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/a0b4e01b8d1240dcc4a9e4250d990a57/4132330093.pdfIn PDF document text
    • http://resetimpianti.it/reset/public/file/posejebib.pdfIn PDF document text
    • http://gazosilikatnn.ru/uploads/files/tudiwotu.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/26981faf03589f1409378efcf7209736/dilemofimegepas.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/72e97f9b48863c6ea265df924d7313ea/92124072414.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/a962866e4e4c44b2cafda00c9c5bd9fb/50246142135.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/rtgdsaocq9i8s4scnotksuqlfi/kigeletidapuxonafixovira.pdfIn PDF document text
    • http://pappteam.hu/userfiles/file/38527050159.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ee5b79e41---sivunenixadubuzifot.pdfIn PDF document text
    • http://thegioidahoacuong.com/uploads/image/files/fuzubigukoliduxelububo.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aeaf2dbf7f0---72680406489.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b06b56478c---19618709461.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_off0000f9dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DC 10704 bytes
SHA-256: cfc269b7a967236ae65beb67f228b255f3298911a8a1dfb188d11d19116843a4
font_01_sfnt_off00011272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11272 16972 bytes
SHA-256: 07b6ec54b4970e968e1b45addf08e3034601858ffd698815a75430fcfd64a883
font_02_sfnt_off00013e99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E99 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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