Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcaaecf1cd386724…

MALICIOUS

PDF

66.3 KB Created: 2020-12-22 03:06:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c00d6eab3039ffc11c5e4f82f13f5e1 SHA-1: 5c31c2f22ff85f8076d5f606c304414de3ae8d60 SHA-256: bcaaecf1cd386724f89301e569cb9dc8a1bde54aba0841446da53e89eb0e1f11
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL, 'https://trafficel.ru/aws?utm_term=namorada+de+aluguel+dublado++utorrent', suggests a phishing or social engineering lure, likely attempting to trick the user into downloading further malware or visiting a malicious site. The document body, though heavily obfuscated, contains fragments that align with the URL's theme, reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=namorada+de+aluguel+dublado++utorrent
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc7a374c89b935f15e3534b/t/5fd5fe5672b1137fa96b5a2f/1607859803826/98718497557.pdf
    • https://uploads.strikinglycdn.com/files/0aceb8ba-9a00-4ad3-a3c9-b2d16b7b62bb/amazing_grace_house_of_the_rising_sun_lead_sheet.pdf
    • https://uploads.strikinglycdn.com/files/f81dfc75-4c92-480f-808e-692b30bd9053/zuvelulutujabeb.pdf
    • https://uploads.strikinglycdn.com/files/1783de62-5319-4995-a9b6-4a3fa0143821/surface_warfare_officer_designator.pdf
    • https://s3.amazonaws.com/geradi/zofemorutamalerevawago.pdf
    • https://uploads.strikinglycdn.com/files/a72da605-a8bf-4066-a8bd-6c5510807618/prose_and_verse_in_macbeth.pdf
    • https://s3.amazonaws.com/lanubili/wafasinomaxofonenenu.pdf
    • https://uploads.strikinglycdn.com/files/b05ae34c-c5d6-4514-8693-44a4cfd19a34/ziruwisifon.pdf
    • https://uploads.strikinglycdn.com/files/dab95183-e961-4603-a3e7-c3216aa53ae2/wefadu.pdf
    • https://uploads.strikinglycdn.com/files/17a0af43-e144-433e-b0be-4a86dfdeedd0/30650310106.pdf
    • https://uploads.strikinglycdn.com/files/c54e7db2-a452-4441-a892-98a222ca1cfb/90655099721.pdf
    • https://s3.amazonaws.com/dugibabafod/yahoo_mail_software_free_for_pc.pdf
    • https://uploads.strikinglycdn.com/files/6487b1f9-d36b-4716-82cf-216046882902/7_4_simplified_mixed_number.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c1c8.bin
54d2632be5dc008c8a254e63f6cfcdc45a5759bae819245168a2bdad5b0f18bd
pdf-font-stream PDF embedded font (sfnt) at offset 0xC1C8 5076 bytes
font_01_sfnt_off0000d2f7.bin
71a185ca1dcf4f4c17c0b027111e25e9a289bed4793c7c0d4961cc439a777b38
pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F7 13320 bytes