Malicious PDF — malware analysis report

Static analysis result for SHA-256 f152d6261522846f…

MALICIOUS

PDF

78.3 KB Created: 2021-03-22 11:26:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3814c9dd2fcb748b1645a4ea3c96043 SHA-1: 2f4225d8751d3d4719e3de53f8b3dd25f5458b5f SHA-256: f152d6261522846fb3db0168f6ae08c220af783861d764fa8fb09f2327b954a1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier also indicate maliciousness. The document body, though heavily obfuscated, contains text related to 'Clasificacion de las benzodiazepinas pdf', which is likely a lure to attract users to the linked malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/award?keyword=clasificacion+de+las+benzodiazepinas+pdf
    • https://cdn.sqhk.co/valujoper/D2xjbgg/memeruginiwafoduxaviliga.pdf
    • https://kagejiwuj.weebly.com/uploads/1/3/4/0/134095923/1109404.pdf
    • https://cdn.sqhk.co/bovutolomevo/eicztTe/91115954414.pdf
    • https://cdn.sqhk.co/ruradavi/gc1jehi/75028804643.pdf
    • https://saletenabij.weebly.com/uploads/1/3/4/3/134339554/8fea4753c8ca1a2.pdf
    • https://cdn.sqhk.co/dibitarebizu/jbYaifs/37986390247.pdf
    • https://bebopajuze.weebly.com/uploads/1/3/5/3/135312866/zugariresemib-wukiwulufubowid.pdf
    • https://cdn.sqhk.co/balaragu/aipjfjb/wimipovanejoliwixosesivej.pdf
    • https://sigibemora.weebly.com/uploads/1/3/3/9/133986782/5780067.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/87d211f0-9972-4b5c-88c0-4d09b528e75e/hp_officejet_7610_ink_system_failure.pdf
    • https://uploads.strikinglycdn.com/files/9b775316-45e8-40b6-afa3-7ae74cf2eb2c/37697542469.pdf
    • https://uploads.strikinglycdn.com/files/c70d1374-96dd-44d5-a2b6-50ed92cca45a/22431284498.pdf
    • https://s3.amazonaws.com/widiku/53207978672.pdf
    • https://s3.amazonaws.com/fuwenoxuzasila/nudafi.pdf
    • https://uploads.strikinglycdn.com/files/ec4b20cc-0514-4a2e-9b7b-f94d54780aa8/impressora_zebra_zt410_manual.pdf
    • https://uploads.strikinglycdn.com/files/77bb6121-05ac-47ca-823a-4519767d5a82/suwawowasupejufuserewo.pdf
    • https://s3.amazonaws.com/jotogorurekuro/mjpru_m._a_final_date_sheet_2019.pdf
    • https://s3.amazonaws.com/neporezofov/billo_video_song_hdyaar.pdf
    • https://uploads.strikinglycdn.com/files/67c521a3-dced-4f28-99b0-5bcc0ec5705c/8098886555.pdf
    • https://uploads.strikinglycdn.com/files/bc06d121-4373-4778-b530-a437749bc848/what_is_soap_based_web_services.pdf
    • https://s3.amazonaws.com/wunojipu/zajojebi.pdf
    • https://s3.amazonaws.com/gaxuremewuger/numapivusurakonowupeme.pdf
    • https://uploads.strikinglycdn.com/files/2a64af62-851f-405f-b689-eaac385919c4/zatikotolidonofumifureveb.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f13c.bin
88cb11cf0d615855c9db8990fe46995deb5652f619aaa0ade5ba2ffbd173edbf
pdf-font-stream PDF embedded font (sfnt) at offset 0xF13C 5148 bytes
font_01_sfnt_off000102d2.bin
8ca3d02f06b0b6918a73791190d2560ec83ed6429f340fafb57d2435f5a0b529
pdf-font-stream PDF embedded font (sfnt) at offset 0x102D2 12752 bytes