Malicious PDF — malware analysis report

Static analysis result for SHA-256 e286e114bb385908…

MALICIOUS

PDF

82.8 KB Created: 2021-09-14 08:07:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 88cb477916166fc69394ca16b2f71e24 SHA-1: f5e39cf8eac0ee079f43adc4cd7da2d7f7c72899 SHA-256: e286e114bb3859084cc6d7af623ff2eb1de8d5c6cea6ffb0b77e490c07efea1f
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, and the document body was unreadable, but the heuristic firings clearly point to a malicious link distribution pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9783

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://msmzizkov.cz/data/dokumenty/xisadif.pdf In PDF document text
    • http://www.egavilanes.com/ckfinder/userfiles/files/kasureroxagekanizafu.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/74436632766.pdfIn PDF document text
    • http://mavelikaradiocese.org/rapha/ckfinder/userfiles/files/31647441135.pdfIn PDF document text
    • http://indianapit.thriftstorewebsites.net/flash/indianapit.thriftstorewebsites.net/file/risafux.pdfIn PDF document text
    • http://beiks.info/public/file/99577650547.pdfIn PDF document text
    • http://www.pacautomarketing.com/file/wepulunef.pdfIn PDF document text
    • http://eggtesting.com/admin/uploads/file/towera.pdfIn PDF document text
    • https://dichvuhappyhouse.com/upload/files/dixokugavipurit.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/84490572194.pdfIn PDF document text
    • http://szamosiszerviz.hu/feltoltott/files/23142962950.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/161394264827a0---zezarazopitana.pdfIn PDF document text
    • http://sun-tes.ru/files/file/vexodulefukaxu.pdfIn PDF document text
    • http://baby-daycare.com/uploads/files/202109081650477494.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613944530d15a---fobevefedupopip.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613213d4ad58c---14024055359.pdfIn PDF document text
    • https://aynispirit.nl/userfiles/file/fawibejekojuxixununo.pdfIn PDF document text
    • http://drzwiukryte.pl/userfiles/file/buperitodexetit.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/161311453adad0---79048863014.pdfIn PDF document text
    • http://woodlandhills.ilovepokebar.com/uploads/files/73167831790.pdfIn PDF document text
    • http://pm-ural.com/uploads/files/19531358399.pdfIn PDF document text
    • http://ucinnovation.ru/admin/ckfinder/userfiles/files/65236324420.pdfIn PDF document text
    • http://rapabzenec.cz/obrazky/files/2345069327.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161353c19d1559---41659942932.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/83632678700.pdfIn PDF document text
    • http://hiroshima-teishaku.com/userfiles/file/84966600128.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=dream+league+mod+apk+2017PDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c16f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC16F 16128 bytes
SHA-256: e086d997b6ee3c3fe48f8fdf49e8854b9e9bef9c53b5c2c5f26bba4f2b277426
font_01_sfnt_off0000d6ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6CE 10812 bytes
SHA-256: cfcd930cea3ca686625ab6495dbf6b1c6c7a4aa4a187cbd10999b72d2811d4c4
font_02_sfnt_off0000ef9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9A 21152 bytes
SHA-256: f2d8364a1f386674f39acefe9e553d184e645670efdea25ae35001f023700e06
font_03_sfnt_off0001252d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1252D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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