Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ac139fd4ce7d8f7…

MALICIOUS

PDF

68.2 KB Created: 2020-12-16 15:30:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: f5732fe3f806071554d3cc27257cda72 SHA-1: b31df23c72a7cb8a67face4087cfdc304bff3697 SHA-256: 4ac139fd4ce7d8f72dff2e9cc11af659f6f0c718888c18de8d30ceedbab49d38
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL leading to a suspicious domain. ClamAV and ML classifiers flagged this file as malicious, specifically as a phishing trojan. The document body, though partially corrupted, suggests a lure related to 'dragon ball z androide 18' to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://trafficel.ru/aws?utm_term=fotos+de+dragon+ball+z+androide+18 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454163/normal_5fb68487e3dd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403415/normal_5f90f1d9ef041.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379471/normal_5fc8d14b41d33.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/b018dc94-2c49-4858-acba-648ab52c8303/87072475039.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/gorigipasasurak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6be88e5-c757-4713-8322-31d6820289c1/tewidaputorumupupapagevi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1939f59b-105b-48c6-8af8-823062f74534/50191288574.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/words_with_aoi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe52c099-ec01-478d-9794-9edc10571447/9137860625.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc19ff392c50b1a1e7ca808/t/5fc60b6d3485235c8695f6ff/1606814581179/53671524305.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1c697bda9c57a97c4683c/t/5fc78da34f9413233b2503cf/1606913444306/horror_movie_trivia_questions_and_answers_printable.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_off0000c0d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0D1 3540 bytes
SHA-256: 89859cea2c4dd5a60d91c242ae75bd2c6edea97abc3e7feb910ec8be36784639
font_01_sfnt_off0000cd64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD64 5384 bytes
SHA-256: 7892f1422f4bf3bf71f07ec9b33a2dab8406b928788e075be7513bba1c9b6003
font_02_sfnt_off0000dfc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC5 10468 bytes
SHA-256: d74819cb7ae096e60b27cba609c55140abb9055e7ebd26099627855231151545