Malicious PDF — malware analysis report

Static analysis result for SHA-256 abd91beb8c4727fa…

MALICIOUS

PDF

78.2 KB Created: 2021-09-04 08:16:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9143a8f285866f6c88c46b7a46c08780 SHA-1: cfe371bb07d318714a498a725299f202426928b0 SHA-256: abd91beb8c4727fa6900e849ada42351609fafe01b2e79cdd7ad1f1f055f5edf
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript, which is often used to redirect users to malicious websites. Several heuristics indicate the presence of link farms and compromised CMS uploads, suggesting an attempt to host malicious content or phish for credentials. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://bet-balance.com/userfiles/file/mirowego.pdf In PDF document text
    • http://cngwalk.com/fckeditor/userfiles/image/warazeroki.pdfIn PDF document text
    • https://susta.vn/userfiles/file/debovukijedopoforagad.pdfIn PDF document text
    • http://daisin1977.com/js/upload/files/28047065078.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16077d2ad59d90---kunis.pdfIn PDF document text
    • http://sz-nuoyi.com/Upload/file/2021081904554580147.pdfIn PDF document text
    • http://uni-farm.pl/ckfinder/userfiles/files/54269240473.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/adbee8b447ac5c9dc5d3ad8a59fc3c74/ropekufubumebub.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/lejazusivipibaj.pdfIn PDF document text
    • http://mcelvain2020reunion.com/clients/b/b5/b5167212b805812c9439186484f80f5e/File/vagokerakilak.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb10005753---28121573282.pdfIn PDF document text
    • http://modelseafarm.com/kweb/ckfinder/userfiles/files/popanutoxuri.pdfIn PDF document text
    • http://nprofit.hk/userfiles/69552644856.pdfIn PDF document text
    • http://sql110.com/pic/97183128803.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607098e1acb31---geres.pdfIn PDF document text
    • https://geo-decouverte.kenamedia.ch/ck/ckfinder/userfiles/files/81433108408.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/51fbf4900b55a68d896064b30cf5acd8/xagawoxobelibit.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16084db287a2a9---38985552664.pdfIn PDF document text
    • https://apotekatia.ba/fajlovi/54498264382.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/h9qkk44hpm9f3v38auk6qn7au1/31555268740.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/38723059849.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16127d1441a922---97344041303.pdfIn PDF document text
    • https://otelnamore.com/wp-content/plugins/super-forms/uploads/php/files/4c8100158fb6e9a38d129c53ad3eb2b7/bilonomomanuv.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a29f72b5909---97316507799.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=elementary+statistics+weiss+9th+edition+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_off0000cbfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBFB 11236 bytes
SHA-256: 8ec9c533d3b81effdd2d5686408a008692bb1edb3593dec1f76a1798573bb9ce
font_01_sfnt_off0000e634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE634 17400 bytes
SHA-256: f2ed7daafb35a172a9256b775ab66cb30becd401c156e9e0f796e2ccf12405bf
font_02_sfnt_off0001131a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1131A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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