Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f17945f9ef0e2c1…

MALICIOUS

PDF

110.3 KB Created: 2021-09-09 23:05:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 810758fee76e2e1028303ffb1d52b6ee SHA-1: d1930ba0e0551500d5865900095ab8624fa82e2f SHA-256: 0f17945f9ef0e2c1327a6fe897bce9c7df9e35d070680b2ce54dbfcd43a72684
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file contains numerous embedded URLs that form a link farm, a common tactic for phishing or distributing malware. Several heuristics indicate these links point to compromised websites or disposable hosting, increasing the likelihood of malicious intent. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9921

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://crysiq.ru/uplcv?utm_term=ghost+adventures+conjuring+house+full+episode+free+online PDF link annotation
    • https://rdw-wolf.de/backend/ckfinder/userfiles/files/rugirifoxovibijelodafi.pdfIn PDF document text
    • http://canphantich.net/Images_upload/files/molizu.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136a0b986598---wiperodizozujuna.pdfIn PDF document text
    • http://kfnmsz.com/upfolder/e/files/20210902084841.pdfIn PDF document text
    • http://tw-sincere.com/upfiles/editor/files/73650089821.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/84051907452.pdfIn PDF document text
    • https://eastoncn.housemember.com/uploads/files/6095195904.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/40314617464.pdfPDF link annotation
    • https://vibanghanoi.com/uploads/files/17843808199.pdfIn PDF document text
    • https://stealthwindow.tw/uploads/files/202109070809057288.pdfIn PDF document text
    • https://groupunsur3.com/contents/files/jidize.pdfIn PDF document text
    • https://inprovitcentroamerica.com/ckfinder/userfiles/files/17799822715.pdfIn PDF document text
    • https://olamare.com/img/uploaded/file/latebupo.pdfIn PDF document text
    • https://ekoelprom.pl/public/images/editor/file/jekuvumutuzalujefej.pdfIn PDF document text
    • http://quanhoangtsi.com/upload/quangtri/files/15297287281.pdfIn PDF document text
    • http://decoworld.in/dayafter/uploadimages/newsimages/file/25565269320.pdfIn PDF document text
    • https://jogamiskolc.hu/ckfinder/userfiles/files/9239334495.pdfIn PDF document text
    • http://xn--12cmi2byac9cdhd0hra6d7bxkwbgj1gch.com/user_img/files/fuzalofixabiporimupuwo.pdfIn PDF document text
    • http://dtyxbpzx.com/filespath/files/20210910033409.pdfIn PDF document text
    • http://tkhomedeco.com/assets/uploads/ckedit/files/20210901085938.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613262c98b304---80624568747.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135f98b01536---zasarumog.pdfIn PDF document text
    • http://radissonhoteltraining.com/userfiles/file/81781626466.pdfIn PDF document text
    • https://shreenatharcade.com/userfiles/file/bebedugakatenazaveramuto.pdfIn PDF document text
    • http://atsrealtyvietnam.com/upload/files/nakiwirewoxenuretokab.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_off000144e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015cfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CFE 11232 bytes
SHA-256: 9064782e12b4949ad718b5559a28e4afd109c7d60640cece2bf16c55a2f8d9be
font_02_sfnt_off00017712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17712 19588 bytes
SHA-256: 37c40ab08ddba55b3f7b242cf1a94e78deb0754b9c9392b44c5d1bb17faff650