Malicious PDF — malware analysis report

Static analysis result for SHA-256 36bd6fd54499ab69…

MALICIOUS

PDF

100.1 KB Created: 2021-07-02 06:46:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: d867cfcd8f2ce0f7350b2c8f43fb0c1e SHA-1: ab258cdac91d18cb8f254361889364a2715afc12 SHA-256: 36bd6fd54499ab69850aeb7a5f81f77dffe66a6293b9ac8c00743b90de20d8e7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised or disposable hosting sites, likely for phishing or malware distribution. Although no scripts were extracted, the PDF structure and embedded URLs suggest an attempt to exploit vulnerabilities or trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c030299ceba---16560188053.pdf In PDF document text
    • http://suachuabaoduongmaynenkhi.com/img_quanganh/files/naxoxinuruxakitomaju.pdfIn PDF document text
    • http://geose.ru/userfiles/file/95790496953.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16087c42e5801c---nizikimadinamulitivi.pdfIn PDF document text
    • http://xtra360.net/campannas/file/jobefex.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072aa6f85610---58447326989.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///202161365567005.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/f1ca4d311860bbeb0043df42eb212aae/muluxajiwik.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/85452278903.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16072015d46c3f---46315813859.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160a55af2d8a5c---sokefawo.pdfIn PDF document text
    • https://firsatoyun.com/calisma2/files/uploads/71691149838.pdfIn PDF document text
    • http://webbuilders.com/files/file/11681016994.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16081072657024---zovisutasazamomurudi.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/74116be5474b1cba008a43b0f1adb9f9/70198425452.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-6-21/20210621214412855575.pdfIn PDF document text
    • http://high-keenltd.com/userfiles/file/magojiru.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/75448002123.pdfIn PDF document text
    • https://avonsteel.com/UserFiles/file/36656301824.pdfIn PDF document text
    • https://jdlpartnerss.com/userfiles/file/vituvedovizeji.pdfIn PDF document text
    • http://volkshilfe-vlbg.at/images/content/files/84262357617.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/54619396944.pdfIn PDF document text
    • https://medtek.vn/storage/file/23309700681.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=teacup+schnauzer+chihuahua+mix+puppiesPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000125d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013dee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DEE 10600 bytes
SHA-256: c9b2203689a18bc0593952a0bbedd2fde69798417b3afdf7482cd317cc54ddf2
font_02_sfnt_off000155f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155F1 16836 bytes
SHA-256: 37bed091ee187a6dc24cda7b40668eea55a9eadd13975e35fcd49301f3bcbce5

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