Malicious PDF — malware analysis report

Static analysis result for SHA-256 ede3757a4bf39d1d…

MALICIOUS

PDF

76.6 KB Created: 2021-09-07 07:44:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c759fb59c40a220a4cd06374f4e16e0d SHA-1: 5e516e30392e3a5e33912d565f6db573e9991c87 SHA-256: ede3757a4bf39d1dfba7b58d4e05b250bf5e1eccdd3a7d2d8f908b170447ea91
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised CMS upload directories and disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature. The primary attack pattern involves luring users through a seemingly innocuous document to external, potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://5percent-design-action.com/upload/users/files/zotupurepokamoju.pdf In PDF document text
    • http://hoshitorionline.com/uploads/files/57752221998.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/7dd721f69ffe93f4100e8a538bc5abb2/runigogegigikewebolives.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/2e4b61454d7701d89abf17f1d6c16b4b/jixugomugebufavitobak.pdfIn PDF document text
    • http://eventologia.com/userfiles/files/40482562002.pdfIn PDF document text
    • http://zge-led.com/luodan/images/userfiles/file/70559773501.pdfIn PDF document text
    • http://aodaibooking.com/FileData/ckfinder/files/20210808_F800BDCB3601E741.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/4jaukfs6ror0j31sh87alrnnfb/94729441330.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/c431d501b1dd5ba5ea251957c77e30b6/99884778818.pdfIn PDF document text
    • http://fructusartis.com/i/File/javefabaxotoxadig.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/85017079961.pdfIn PDF document text
    • http://wedding-box100.com/uploads/files/202108250446318343.pdfIn PDF document text
    • https://www.borzabadi.com/ckfinder/userfiles/files/47594979127.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/xopobijenadowovuzug.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1609a8d624530a---tifaba.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/ddacc51f4f90ac880200734eb97abf59/70404300920.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/l70lk5dpj00ui5tn32qrp5ifd2/8457155137.pdfIn PDF document text
    • https://cdmsig.com/ckfinder/userfiles/files/33928230994.pdfIn PDF document text
    • http://studioindelicato.com/userfiles/files/dadapexivaponipupir.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b6a7dd868---sepeputoxuvifijom.pdfIn PDF document text
    • https://lecourbe.dk/userfiles/file/muliduzujuzufezasinowipet.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e69c6c991c9---legutejolume.pdfIn PDF document text
    • http://tydafa.com/dafa/uploadfiles/20210625214345.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/92294780423.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/el6vcnkqo5b0q2sqaehf46diss/55505118621.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/355989d81ecab701b7a6ef3c4434ba58/24901239448.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=telling+relative+time+worksheet+answersPDF 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_off0000c872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC872 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE089 10764 bytes
SHA-256: 2bbe57ffd4d842d01a29aa9c85cc12bc572e5384778810a53d7a2f94da449729
font_02_sfnt_off0000f92f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF92F 16840 bytes
SHA-256: 577a5e100ad68bedf1f05d014b2c2eb648e56fe332cdf67d8374926cfabfb95d

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