Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fe96cbccec3963d…

MALICIOUS

PDF

84.2 KB Created: 2021-09-23 01:11:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 891e2569b2e0fca2ae44a302fc2f232c SHA-1: 829f1c63c6ec8fb12c87ee718b4a20d1a75e2339 SHA-256: 9fe96cbccec3963db429f7d1c0214a7d809c8a624b7e743f59c3d21bd611edeb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly indicate a link farm designed to distribute malicious content or phish users. While no scripts were explicitly extracted, the nature of the URLs and the ML classification suggest a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://laborke.ru/uplcv?utm_term=minecraft+list+of+things+to+do PDF link annotation
    • http://tareeapartment.com/user_img/files/favepamebuwiz.pdfIn PDF document text
    • http://noithatdangcap.vn/app/webroot/uploads/files/37470211085.pdfIn PDF document text
    • http://labradory.pl/file/61079127315.pdfIn PDF document text
    • http://smcertificationservices.com/userfiles/files/18622828540.pdfIn PDF document text
    • https://activepymes.com/pub/file/sizitubivirusugo.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/s12epnbppcb1d2432eut23u402/sunelajunixaraputojevova.pdfIn PDF document text
    • https://gbagencement.fr/uploads/file/mevokumonavibid.pdfIn PDF document text
    • https://superlitefan.com/uploads/files/18597824495.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/ad3238c99494e2b5d818204167e6b39d/11394398364.pdfIn PDF document text
    • https://wita.lt/images/files/rarezovonigewanoj.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614342c2d5e40---baxenokob.pdfIn PDF document text
    • http://www.offshoreyachts.net/web_upload/editor/files/zujolubojoravazijejopiz.pdfIn PDF document text
    • https://hanomanberjaya.com/contents/files/zijifanaga.pdfIn PDF document text
    • https://incoyun.com/calisma2/files/uploads/kotefomibolagumebalesaku.pdfIn PDF document text
    • https://tatvan.in/userfiles/file/51991639191.pdfIn PDF document text
    • https://www.hotel-restaurant-plainfaing.fr/ckfinder/userfiles/files/58190145076.pdfIn PDF document text
    • https://yomadesign.com/userfiles/Proj_Name/files/gilidadadobanadereroki.pdfIn PDF document text
    • http://hocomesun.com/upload/kufukulimonibepogaful.pdfIn PDF document text
    • https://megashina24.ru/files/files/lejuwugosafotetu.pdfIn PDF document text
    • http://magendans.com/imagefiles/file/dowerumaju.pdfIn PDF document text
    • http://geometracosentino.com/userfiles/files/12613285240.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d35623b11f---93155323434.pdfIn PDF document text
    • http://praconsulgroup.ru/pict/file/sedirufonovawad.pdfIn PDF document text
    • https://ijfbacknumber.com/editor_up/1980106030.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1613bab20f3150---89861152883.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_off0000e52a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE52A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3C 17484 bytes
SHA-256: 9bb2154732dd844a4d981622ef60a1676470e1eb2f913e225a0fe61cb162cd23
font_02_sfnt_off00012aa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AA1 10748 bytes
SHA-256: f992c4d8755cfe685acc30c943132f9d2e57ab693d656bc09a0f2cca4a1a494b