Malicious PDF — malware analysis report

Static analysis result for SHA-256 70fb717e61d0ec72…

MALICIOUS

PDF

77.5 KB Created: 2021-01-02 18:51:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 766c7422f6fe9673a9c7ba737f668339 SHA-1: 758f4810bc114e62fb00a93d4146a3c1c8a1fdee SHA-256: 70fb717e61d0ec72fd023579f27b7227cb535e2fa210cf704e12b40835fd7172
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, with one identified as a known malicious redirector. The ML classifier and ClamAV also flagged this file as malicious, indicating a high likelihood of phishing or malware distribution. No scripts were extracted, but the link farm suggests an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ggtraff.ru/123?utm_term=leather+horse+armor+recipe
    • https://cdn-cms.f-static.net/uploads/4416661/normal_5fc359a352d28.pdf
    • https://static.s123-cdn-static.com/uploads/4491451/normal_5fe412c573e10.pdf
    • https://cdn-cms.f-static.net/uploads/4376857/normal_5f8d175de3c03.pdf
    • https://cdn-cms.f-static.net/uploads/4414152/normal_5f985ca0346aa.pdf
    • https://cdn-cms.f-static.net/uploads/4392457/normal_5f9ef871caa07.pdf
    • https://cdn.sqhk.co/sozovifena/ghSYigg/13038565377.pdf
    • https://dezojase.weebly.com/uploads/1/3/4/7/134711134/vawugavefozik.pdf
    • https://cdn-cms.f-static.net/uploads/4379616/normal_5f8b57758ed3d.pdf
    • https://static.s123-cdn-static.com/uploads/4410678/normal_5fce22ba6e9dd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/subud/24067180270.pdf
    • https://s3.amazonaws.com/gowebabuxogiro/gravity_falls_memes_1_hour.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd8c.bin
fdf387dabd29dd4b14afe0575515ea0ce1f1f17cb9d8d13c200461aacf7009d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD8C 5080 bytes
font_01_sfnt_off0000dea5.bin
19cf9bfad1f9d03932a0843d26d8a1aeb454d475d51766457a355a44911fe9c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA5 3896 bytes
font_02_sfnt_off0000e8c7.bin
20ec91d236cf709a72bcc9d3eb893fb89d4841be0ce83c0d5d92fa00fffe44c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C7 10800 bytes
font_03_sfnt_off00010dee.bin
9dd58dd71266a3a8438731f3015b934d4e41aed2b4cdcdc3a4f18b2caecb24d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DEE 18568 bytes

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