Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b8253f30c033cce…

MALICIOUS

PDF

86.0 KB Created: 2021-09-07 15:20:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1f793026c1e0918fa63b2e00a1e95aae SHA-1: d40f29f42ad1234a9a2d842d2c0fe4b668d32d89 SHA-256: 0b8253f30c033cce28c805581daedd325072da156164c588606bfc3961271e76
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress sites and other potentially malicious domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

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://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/3ccf1f00839b6401f8c6bd31f620e386/26263710645.pdf In PDF document text
    • http://c-amc.com/upload/files/ziwanaligikibitefusovej.pdfIn PDF document text
    • https://smlstripedbass.com/home/rock/public_html/ckfinder/userfiles/files/29150483312.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/buvakem.pdfIn PDF document text
    • http://aunay-sous-auneau.fr/ckfinder/userfiles/files/lulimafinasisuloxanugil.pdfIn PDF document text
    • http://goddesshair.net/upload/users/files/82353113414.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/dc97f0f02659c6eb28c19fa83c2c3e49/56036760422.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/2ip5p0s9bo27lothm0n0hh2gks/95954989961.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/h72j2vr6qh39pl3ah97k30cij6/rozav.pdfIn PDF document text
    • https://nazragame.com/calisma2/files/uploads/wogilem.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/42532351905.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/4affdf6c0281f032d55cb6c22e21956b/62679662759.pdfIn PDF document text
    • http://maychamsocda.vn/images/userfiles/file/vakabusaludev.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/jul8qj2d9o8bm92d8i55nsnkni/lipifubuvarazalaminatuj.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb73b7d664e---70565641573.pdfIn PDF document text
    • http://classicalgardenfountains.com/uplds/file/bugojibibakum.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160828105be46c---seforamavavuxikekes.pdfIn PDF document text
    • https://n-vv.dk/userfiles/file/41146814188.pdfIn PDF document text
    • https://taiwancy.com/app/webroot/userfiles/files/sipiz.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/3e0b843993792df411614386c6e1fd0c/79883899393.pdfIn PDF document text
    • http://euredit-editions.com/userfiles/file/55766060807.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c7cbe5618---vunutoxalozeweme.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b48dd674b4a---56927820074.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c503d564bea---xerotojoba.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/aa190g6h76p1j7q0sfus2pbsr2/36075575888.pdfIn PDF document text
    • http://electriccityusa.com/images/fck_uploads/file/xafujejaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=sri+suktam+lyrics+in+malayalam+pdfPDF link annotation
    • 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_off0000e598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE598 10912 bytes
SHA-256: b1dfa810a668a4db11cc57d341853032bd03bbd110e445910c66ca8f2eb3d623
font_01_sfnt_off0000fedc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000116ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116EE 19688 bytes
SHA-256: e6e91bff2779ad0e3040480f5e587f6419f202d60eff1b8a443b956f6a10672d