Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c2b7be18037614d…

MALICIOUS

PDF

78.7 KB Created: 2020-12-23 17:59:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 0d66dfdb427d5e44078ca19b25dca55c SHA-1: c9f19b481ae145fcb288c1d7750b5bfe5ac57e75 SHA-256: 3c2b7be18037614dd08f2707ae0524512cc6a83a48b9a075e617641bc885e2a9
96 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, suggests a lure related to educational materials, specifically factoring quadratic equations, to entice users to click the link. No scripts were extracted, but the presence of external URIs and the overall detection profile suggest it functions as a downloader or redirector.

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
  • 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/123?utm_term=factoring+quadratic+equations+word+problems+worksheet PDF link annotation
    • https://zezevibowavaki.weebly.com/uploads/1/3/4/8/134854125/tojotofu.pdfIn PDF document text
    • https://dotanivim.weebly.com/uploads/1/3/4/7/134705276/lomeloxopivaxagifiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401711/normal_5f9aed44a5e74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407070/normal_5f91f6b14f5fa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419820/normal_5fd05953e9571.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458407/normal_5fabe6b4d94d5.pdfIn PDF document text
    • https://sirawomaperuli.weebly.com/uploads/1/3/1/3/131398091/muwotula.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406516/normal_5fc1f5120803b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482190/normal_5fdfd6b42961e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375070/normal_5f8e6ee61ee76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470543/normal_5fb8d33fa5930.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/38884280-c6a0-439a-b3a5-00afc803c810/9030458587.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbcc20bd-7c0b-4409-b135-95ea9afd741d/34847765148.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78d031fb-f98f-4316-98fd-f09236f53ffc/15500460171.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01c58e60-185c-4deb-bafe-a7925bb6215a/64159254557.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d40d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD40D 5864 bytes
SHA-256: 48d683bbb79147aca1277fe472fa9581d52d93b67c98cd69efd3717adddf2f58
font_01_sfnt_off0000e7d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D0 2108 bytes
SHA-256: 8c1d5ad1ff22b55f360bb5e2302fc16aaac8265bc126c4c85fa75ba2dede2ca7
font_02_sfnt_off0000f0f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F7 11360 bytes
SHA-256: 953def1a19e7f58ac303e7b9c4b556b560b12db774432b0c8164976567e19264
font_03_sfnt_off000117db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117DB 16096 bytes
SHA-256: 58a1e1f5b06e63281e1c84f804f7eeb3fa21835e9eae58838fedc7273f8b9f4b

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