Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5f7e71cded45c5d…

MALICIOUS

PDF

95.0 KB Created: 2021-01-14 00:44:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 8cbb8eef78947d826eb1c9cd1c64ca98 SHA-1: 7ad77980f1f07ed58feba290fc0a7100e6cb5be3 SHA-256: c5f7e71cded45c5d3d84246dcc8a5b05674070c694bc4cb01593676d926bc357
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffine.ru'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL indicates an attempt to redirect the user to a harmful site, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • 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 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.
  • 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://traffine.ru/123?utm_term=monique+weight+loss+surgery In PDF document text
    • https://site-1175166.mozfiles.com/files/1175166/guretipidapexowora.pdfIn PDF document text
    • https://cdn.sqhk.co/teketerep/f6ifxkj/napirobijugujeborixaw.pdfIn PDF document text
    • https://cdn.sqhk.co/kewusikata/siigcje/zombieland_double_tapper_rules.pdfIn PDF document text
    • https://site-1211946.mozfiles.com/files/1211946/magazanobawusok.pdfIn PDF document text
    • https://cdn.sqhk.co/fepogosu/hhpan08/56758589578.pdfIn PDF document text
    • https://site-1173807.mozfiles.com/files/1173807/mega_millions_numbers_michigan_payout.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450240/normal_5fe75d65cf589.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374521/normal_5fa76c2998815.pdfIn PDF document text
    • https://cdn.sqhk.co/xulawajikigi/jaxRgen/warehouse_shipping_receiving_manager_job_description.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470981/normal_5fb87dcee9f89.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/remufuzu/pugobefefaju.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/jajabusejaruxivon.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/mugewez.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/19410567156.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DA 3240 bytes
SHA-256: 9d79011cb6eacceefecc58cf3353ad758e97b9648d65d1a85d355bdf0163d0df
font_01_sfnt_off00010365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10365 5064 bytes
SHA-256: 0b67369242d79c4a6f4b017dcb48383190f56ba2eb5e8a23bc95f076f6c0a5f6
font_02_sfnt_off000114b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B4 6660 bytes
SHA-256: 0a1d7ec0f06f84dc2241468cd773ee0dec775fed1780e3288dfcaea13384a705
font_03_sfnt_off0001281f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1281F 14476 bytes
SHA-256: 6196563011e90a96779c4c3ce6827351ab91d26900718332280a82741050292b
font_04_sfnt_off000156eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156EB 16840 bytes
SHA-256: 0e58083b686b79474707bc5ab98e77de050ef0b8563bc782dc8319233bc17991

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