Malicious PDF — malware analysis report

Static analysis result for SHA-256 58e2fdca7124dd82…

MALICIOUS

PDF

97.1 KB Created: 2021-07-05 08:15:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ce7753cbe1d0a99786ffc89a24d391f4 SHA-1: 546df61108d52104bb1f292a5990f378d47b6c4c SHA-256: 58e2fdca7124dd821651f24f03cf41435e4d3858ed5ea16d947fe3c8b112e139
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or redirection attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to lure users to malicious content or exploit vulnerabilities. The file's structure and link farm nature align with techniques used to distribute malware or conduct phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/j51ef510td239oogm780r2uok4/volagenidimivus.pdf In PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/a85dc60bd207b2f4f5ff0410014e927c/fubofojojux.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/m5tj8l9rb288s71v3abqlufg2j/famozozanebofex.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/1c59b50bb71a028889d386cb1051908f/nejibixanakefan.pdfIn PDF document text
    • http://3qbuy.com/CKEdit/upload/files/zomatigamusomasipav.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/25a861712c0f8a3b322c983733121fbf/32740091381.pdfIn PDF document text
    • http://amctop.com/board_data/editor_img/file/202105230747.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/1571241ae2df316429c505831642f297/85346397848.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/386545176.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/k39q465r9juvpb2c3gkpue5jft/20567686054.pdfIn PDF document text
    • https://raljob.com/userfiles/file/32897983160.pdfIn PDF document text
    • https://imagebuzz.net/ckfinder/userfiles/files/fizarofutilenoj.pdfIn PDF document text
    • http://jjkxmy.com/upload/files/202106212101097532.pdfIn PDF document text
    • http://2478.ru/admin/ckfinder/userfiles/files/49860576093.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/28f11ac69be43e13305e2024c5041a21/ziginuveterumuzizova.pdfIn PDF document text
    • http://nw-line.ru/generic/uploaded/texerebi.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/vqqm9tnifnoefckfal879akbq3/marujokuwitewos.pdfIn PDF document text
    • http://songiadahoaian.com/upload/ck/files/94316605945.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16077ed5f362c7---bododawotut.pdfIn PDF document text
    • http://bukharasuwanee.com/sites/default/files/file/19983020300.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/haoka58ukdul5mhp0379biktd2/wupuliged.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e64a52751---lagupijez.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/41832041930.pdfIn PDF document text
    • https://bauarch.bg/files/72666261224.pdfIn PDF document text
    • https://mayurherbal.com/userfiles/file/79977270689.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=dark+green+andPDF 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_off00011b14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B14 17592 bytes
SHA-256: 4b7c5ac1e6b7012752898b67bd02194ef51071989d76074c2699aeac8aa4754f
font_01_sfnt_off0001491a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1491A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16130 9992 bytes
SHA-256: d805289621ce35bed3e4ede6710f93a06f8d901dc983635bd9db7eb450fd7e90