Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f14beac46f06fa2…

MALICIOUS

PDF

91.8 KB Created: 2021-09-13 06:56:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0f4b21cb19f776ac8bbdf57939ee0051 SHA-1: 150058dc8d7086be577d3d28d40113ec22bd476e SHA-256: 8f14beac46f06fa2a0f5a2b2d5c2f80b335643ac68b2f6b740977c918e64bbce
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected by ClamAV as a Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It functions as a link farm, with numerous embedded URLs pointing to various domains, some of which are hosted on compromised CMS upload storage. The presence of these links suggests an attempt to lure users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nwatchonline.org/userfiles/file/61946394195.pdf In PDF document text
    • http://klpa.net/userData/board/file/niralanelisixiwefufixaju.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/18211349701.pdfIn PDF document text
    • http://clingac.es/d/files/70867687017.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/mites.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16133376869141---31674446918.pdfIn PDF document text
    • https://xn--80aaa1arbfjoe3bzh.xn--p1ai/data/files/xisimedo.pdfIn PDF document text
    • https://hoya.hr/UserFiles/file/boged.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161333a68b60fe---didoluzupiwomoxapu.pdfIn PDF document text
    • https://alperbehang.nl/userfiles/file/3148595472.pdfIn PDF document text
    • http://xn--9i1b14l32gg2dsybq3b.com/upload/fckeditor/file/9205858251.pdfIn PDF document text
    • http://restokrat.info/userfiles/file/73084504900.pdfIn PDF document text
    • http://myrbacken.se/login/ckfinder/userfiles/files/58057865610.pdfIn PDF document text
    • http://intemhathanh.com/img_duhoc/files/lisuvuvusujire.pdfIn PDF document text
    • http://760_709737661.mildmedia-dev.eu/uploads/userfiles/files/lipazazukedodeluguwusige.pdfIn PDF document text
    • http://bienbao.net/uploads/files/bagibusidisazupejuravin.pdfIn PDF document text
    • http://beijingteye.com/upload/files/97442509289.pdfIn PDF document text
    • http://sentralperdana.com/file/90221205111.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161365d3864d75---zabawak.pdfIn PDF document text
    • https://www.piramideidiomas.com/ckfinder/userfiles/files/dajudimotupuv.pdfIn PDF document text
    • http://www.rafaellucenaehijos.com/ckfinder/userfiles/files/gojebitufinuf.pdfIn PDF document text
    • https://xtrafitcoaching.com/www/images/files/sugowepezoliw.pdfIn PDF document text
    • http://hamzalegalservices.com/userfiles/file/xosimelef.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613abd0505120---kirog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=orbot+for+windowsPDF 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_off000103e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011bfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BFB 10256 bytes
SHA-256: 1863d582d9cd9653ff93a64fa8606253862b12f0df28fbad8e6dbd49b0221cf8
font_02_sfnt_off00013333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13333 17716 bytes
SHA-256: d0dd0f78804eac0c7366507d4452d383d7fe840735e8c9e4e2a4743533d54529

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