Malicious PDF — malware analysis report

Static analysis result for SHA-256 89be62d0540c3d5d…

MALICIOUS

PDF

82.0 KB Created: 2021-09-06 02:15:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5efe409cd7087a1d9fd5000341f4df58 SHA-1: 557a78d87e13dc8c591fc21bbd1c627978878f7e SHA-256: 89be62d0540c3d5dcb95bc8b4d995477edbbbc6f90952aecff282615e2d2458d
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution scheme. The document body was unreadable, but the presence of numerous external links strongly supports the attack pattern.

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 http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff5fccf71f---29823279427.pdf In PDF document text
    • https://cgeminfos.ma/upload/file/kagejuk.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/kipofigamebekonaragimufen.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/fc313cfd70aea6ce3d1e48a54a9e153d/digisawavabirikobogujumi.pdfIn PDF document text
    • http://seksdagen.nl/userfiles/file/gonepipododopamazeber.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb1d0a2f83---96712249681.pdfIn PDF document text
    • http://gtshotel.it/images/file/jekujetazopetaribu.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1611fc7999dcd2---dupepoxigugikozajev.pdfIn PDF document text
    • https://intervalhousehamilton.org/ckfinder/userfiles/files/lexetifuwamisaluj.pdfIn PDF document text
    • http://dnepropress.net/files/file/72718173639.pdfIn PDF document text
    • https://hostmegasoft.com/calisma2/files/uploads/foxuto.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090040536ce5---54998073185.pdfIn PDF document text
    • http://rintoyo.com/userfiles/file/39407555773.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/45554948685.pdfIn PDF document text
    • http://tvkinter.com/file_media/file_image/file/varit.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/c7d18d4ec9ddc337033e39f86f67ff8c/wusiworarimukafex.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/28023181185.pdfIn PDF document text
    • http://lyzebrno.cz/userfiles/file/domoloragige.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/86625299099.pdfIn PDF document text
    • http://mppscstudy.com/admin/usercontent/file/wosibo.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/f7c8c7fa4c380c7c9a32621603787fcb/44978290477.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/mc9o20vci4qutfrhh01rm4uq3g/fuvubugojodu.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/2ca63ea16c018b96269f7783c54122d7/fogukipipugugo.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/4267417691.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/e31836b98114400d390788fbe91ab9e2/fupututalakafagal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=new+format+of+resume+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_off0000ddc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC6 17008 bytes
SHA-256: d0688d165696523685028012de69c61aae19799e84f9f4ea5ac7b9f9d113909d
font_01_sfnt_off00010a15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A15 10580 bytes
SHA-256: 3a73a67709fa8d2395de2630cdb3d3664fc306a0c7eb96b7bb2106f3cedd26c4
font_02_sfnt_off0001225c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1225C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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