Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7750df32c469904…

MALICIOUS

PDF

86.4 KB Created: 2021-09-21 03:21:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 590db7ddaab5502b9a5cd2da0a8e83d9 SHA-1: f99130dc42c259206cd189050d33eb8f6cdccf14 SHA-256: a7750df32c46990428b628f97781dc305bd3f4c5d22d1c90b4cd292ee4a08fe0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many hosted on compromised or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded JavaScript and ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://cructi.ru/uplcv?utm_term=sony+all+android+phone+list PDF link annotation
    • http://francescofesta.it/userfiles/files/tezuloxonewowijuz.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f9d7e3342f---37693573677.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/jasatok.pdfIn PDF document text
    • http://wwpokebar.com/uploads/files/73197372754.pdfIn PDF document text
    • http://autosklo.sk/pictures/file/87314861700.pdfIn PDF document text
    • https://siangyun.com/upfiles/editor/files/sadivetunavame.pdfIn PDF document text
    • http://sial.pl/galeria/file/parilolilujise.pdfIn PDF document text
    • http://ip-malkov.ru/uploads/files/pejexulisazi.pdfIn PDF document text
    • http://cityclick.it/userfiles/files/94276553176.pdfIn PDF document text
    • https://cambodiaangkorhomestay.com/userfiles/file/koligowejoromit.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/luv5tgvfv3n9hk6lq784vg72r7/32585335204.pdfIn PDF document text
    • http://atem.sciara.eu/public/upload/file/90478347054.pdfIn PDF document text
    • http://goodtraefarm.com/ckupload/files/69251261313.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613d61c525871---84241728055.pdfIn PDF document text
    • http://yigang-lin.com/uploads/files/202109110608277398.pdfIn PDF document text
    • https://nepalonetours.com/userfiles/files/mesadabapazujaxeromelafit.pdfIn PDF document text
    • https://nmg.lv/img/uploads/files/40706113420.pdfIn PDF document text
    • http://vendsol.com/userfiles/file/38577129596.pdfIn PDF document text
    • http://csc-0411.com/userfiles/file/20210904235944_tvgokm.pdfIn PDF document text
    • http://fratellilongoni.com/userfiles/files/bofajalu.pdfIn PDF document text
    • http://platypusspot.org/uploads/ckfinder/userfiles/files/robodofa.pdfIn PDF document text
    • https://monyetmesum.com/contents/files/9212896704.pdfIn PDF document text
    • https://easy2ticket.com/upload/files/88258475768.pdfIn PDF document text
    • http://taketty.xyz/js/ckfinder/userfiles/files/12329896127.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_off0000ed35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010547.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10547 17740 bytes
SHA-256: 83476cfa074306f4d0d43af4e0de64063bbe964d3bdf35178c9ed621023185f1
font_02_sfnt_off000133ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133BA 10680 bytes
SHA-256: 3a0d5c6be0007964dfb50f1c1b58a83f589077ce0927077dc536cddbdaa738c7

Open this report in the interactive analyzer, or submit your own file for analysis.