Malicious PDF — malware analysis report

Static analysis result for SHA-256 17b0734cebd8c98a…

MALICIOUS

PDF

76.4 KB Created: 2021-03-01 10:45:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 423bc4deda5a6609f292e3787807fb5e SHA-1: eec5ab8a53e2dbcefa90f4ccabbb16729984d22a SHA-256: 17b0734cebd8c98a84667b68e29e37d25b3a12a6f2d13ef5c77be9088318d5e1
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to PDF files hosted on various platforms, suggesting a link farm or SEO poisoning tactic. The primary URL, 'fokemale.ru', is likely used to distribute malicious content or phish users. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://fokemale.ru/wb?keyword=grounding%20flammable%20storage%20cabinets%20osha PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4483338/normal_5fddbdf31fa5a.pdfIn PDF document text
    • https://bovatukal.weebly.com/uploads/1/3/0/7/130739183/1773073.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380211/normal_601f0d25cf7c8.pdfIn PDF document text
    • http://salonvarna.com/86319071413m1jgg.pdfIn PDF document text
    • http://topfrag.rip/fedanuv6nkfj.pdfIn PDF document text
    • https://wedutigumufezeb.weebly.com/uploads/1/3/4/6/134659425/tanawanojez.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411686/normal_5fde68753a30e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411479/normal_603c75e27a446.pdfIn PDF document text
    • https://negedawitadunez.weebly.com/uploads/1/3/4/5/134587096/sorur-vakaweke-wirevenav-miliruk.pdfIn PDF document text
    • https://lelorovosa.weebly.com/uploads/1/3/1/0/131071021/2170587.pdfIn PDF document text
    • http://moreprodukti.com/romeo_y_julieta_reserva_churchill_2008y04cf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382949/normal_5fdec05a99699.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459175/normal_603b9ad430b8e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392441/normal_6006725748ba3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fejififimaketo/pink_suedette_platform_ankle_strap_heels.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE197 5488 bytes
SHA-256: 6a552005b3a4ba46e779e4e7d271236ff4e2128e4749aa812777ecbcdd79ab45
font_01_sfnt_off0000f416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF416 9952 bytes
SHA-256: 3ca0fb2d857dc54e3bdd485649af8783ed0aa7b17ae12628ce416ff66eacc52d
font_02_sfnt_off00011621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11621 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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