Malicious PDF — malware analysis report

Static analysis result for SHA-256 969f49023c68cc87…

MALICIOUS

PDF

74.1 KB Created: 2021-09-09 09:23:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 176d244839a66c3c99ddf63441c503fe SHA-1: 8c15de18a49e3a1180d9c6bdcaa7e042ad262c7c SHA-256: 969f49023c68cc8701615750dce4a337bff23d9954c7e1923aeb3e134d8c5007
156 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or trojan distribution. It functions as a link farm, containing numerous URLs that point to external resources, many of which are hosted on compromised CMS platforms or disposable domains. The primary purpose appears to be directing users to potentially harmful content or further stages of infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://southwestlooms.com/admin/userfiles/files/ruvebise.pdf In PDF document text
    • http://uteambio.com/upload/files/judazidodarudutuze.pdfIn PDF document text
    • http://xn--zb0bw3kv4s8mn.com/upload/fckeditor/file/miramamazariwatamutetume.pdfIn PDF document text
    • https://middletonchambers.com/ckfinder/userfiles/files/8498938158.pdfIn PDF document text
    • http://lamardaegu.com/upfile/user/file/kurolazuzabim.pdfIn PDF document text
    • http://atek-ent.com/upload/file/13797712405.pdfIn PDF document text
    • https://isitekmuhendislik.com/userfiles/file/sijel.pdfIn PDF document text
    • http://malovanesklomh.cz/images/file/nejamonusowagifinote.pdfIn PDF document text
    • http://phongkhamthienhoa.org/images/files/wonedujagupupikukarug.pdfIn PDF document text
    • http://softtox.pl/new/userfiles/file/putes.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/ed860d84f7b0a937dfe08d52d56faaf7/timabumubanapovigal.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/161326b4a3021c---87378773031.pdfIn PDF document text
    • https://samudra99.com/contents/files/sotojineka.pdfIn PDF document text
    • https://projetounificado.com/uploads/files/74777752019.pdfIn PDF document text
    • http://villaelen.it/userfiles/files/dajujudamepegazovukipidij.pdfIn PDF document text
    • http://csc-028.com/userfiles/file/20210906051256_nvlpnn.pdfIn PDF document text
    • http://kelsenator.com/userimages/78116768903.pdfIn PDF document text
    • https://robert-zauer.cz/userfiles/file/55570980568.pdfIn PDF document text
    • http://iwort.de/userfiles/file/47568981472.pdfIn PDF document text
    • http://newbiesites.com/userfiles/file/48414767091.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/1d504ec5e7ee9387ae408c7886085d3b/45172485050.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=mulan+2+putlockerPDF 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_off0000ba9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA9A 10412 bytes
SHA-256: 27d535a9ff14853e6fc04da42b78300c33a3ea79f224e951b0aa1a54dafb767b
font_01_sfnt_off0000d269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD269 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ea7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7B 18924 bytes
SHA-256: fd5fb45d622528232e6284483d6775c7d2ffc7f8c0ab7d0f80289b8646620bdd