Malicious PDF — malware analysis report

Static analysis result for SHA-256 377dd9ea4020dfed…

MALICIOUS

PDF

89.5 KB Created: 2020-12-27 15:54:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 5f3980187b6911f075cd61bdc77063f4 SHA-1: cad6e56102e3d62c59648db8fb8c766cbb07c64e SHA-256: 377dd9ea4020dfeda532973a88af87a951daec3cdb0aae079a15bfa9ec32eff3
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 'https://gettraff.ru/aws'. ML classification also strongly indicates maliciousness. The document body, though heavily obfuscated, contains text related to a crossword puzzle, potentially serving as a lure. The embedded URL is the primary indicator of malicious intent, likely leading to a phishing page or a further stage of infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gettraff.ru/aws?utm_term=ave+caradriforme+de+cuerpo+blanco+crucigrama In PDF document text
    • https://nibuwoxemunovox.weebly.com/uploads/1/3/4/7/134714338/sokepifuzutemulas.pdfIn PDF document text
    • https://viworisexefu.weebly.com/uploads/1/3/4/8/134885507/vivosaza_direbawurusirus.pdfIn PDF document text
    • https://fazofiketir.weebly.com/uploads/1/3/4/5/134507238/3f01deaa2786.pdfIn PDF document text
    • https://nagugopusoz.weebly.com/uploads/1/3/4/6/134645600/bemabe.pdfIn PDF document text
    • https://bujugumaxu.weebly.com/uploads/1/3/4/0/134096797/3704324.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8beb07a-9469-41b3-9bc0-b7e9798d00e8/resekamemufojasutazij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62d18e97-1849-4239-a6d8-a3b8130cd437/dapobamivizef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b7323d2-034e-4c6a-8773-f6baa175ebf7/60495668420.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f6e3c67-c2f5-4473-bfb6-f45b59eb1153/maytag_bravos_mct_washer.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/tobilimepezomojavuwosi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c8a37c0-470c-4009-809a-5666db876f7d/dupewixodokopo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6ee283f-4f89-43be-9a19-8157bc931bf9/12624155165.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/911d1fd4-f0f4-439a-8ad5-4c8dbdfbe751/gaxajomexamawelijok.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF570 6744 bytes
SHA-256: 127b44c9f93874c96d25eb7ddc4688780d8877ce931cf296363fb5748d8d514b
font_01_sfnt_off00010657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10657 5484 bytes
SHA-256: 88be5e519c6252407257ab83562960613766178ea2075fa6c9cbb4f38cabd38a
font_02_sfnt_off000118f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F0 11844 bytes
SHA-256: d4b6880a921b6405fb0a1aff9f2458c1c812feb14b7550ffeab2ab68a381cf5b
font_03_sfnt_off00013fb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FB1 16488 bytes
SHA-256: 9f2bd3c783f8bad964ea757f7f02ad9402bd5df513bf11f1a338edda01b1a38e

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