Malicious PDF — malware analysis report

Static analysis result for SHA-256 846055f51b233ae4…

MALICIOUS

PDF

80.3 KB Created: 2021-01-17 00:40:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 25a6cb662369cf9f1c9c1a1e89e66bfb SHA-1: 72f994247520911ef8a06906e433b50216f5ddb2 SHA-256: 846055f51b233ae46a5f4744c051203590792b9af18d0cb2e0ec536b8d3a24fd
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains embedded URLs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'climate factors worksheet answers', directing users to a suspicious domain. The presence of multiple external URIs indicates an attempt to redirect the user to potentially malicious content or download further payloads.

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://traffking.ru/123?utm_term=climate+factors+worksheet+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4493876/normal_5fba0d1abf5d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413967/normal_5fe26b66c1d6e.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/hjq0Vgi/65349765224.pdfIn PDF document text
    • https://cdn.sqhk.co/jepipovi/TUwbumA/56761393548.pdfIn PDF document text
    • https://site-1172255.mozfiles.com/files/1172255/75613813837.pdfIn PDF document text
    • https://site-1168209.mozfiles.com/files/1168209/aaron_jones_packers_news.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxukulalodi/haQwsjf/12845149238.pdfIn PDF document text
    • https://site-1179585.mozfiles.com/files/1179585/16941650354.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451352/normal_5fe8033d30955.pdfIn PDF document text
    • https://cdn.sqhk.co/wabajevebe/jiZTRu8/micro_machines_v4_pc_gameplay.pdfIn PDF document text
    • https://site-1228032.mozfiles.com/files/1228032/zexukon.pdfIn PDF document text
    • https://cdn.sqhk.co/dodufiruw/hfifhcc/zudabulatadefofekine.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385631/normal_5f8e23ba8e160.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C5 6488 bytes
SHA-256: 1c91939f9623c6519a108840c49867b6a6525adb28191954086a95235b54df98
font_01_sfnt_off0000e1ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AB 8988 bytes
SHA-256: 48e345e30b7b1aad92085ec836da9258ead11e5c27031bc538c4c2e56a426320
font_02_sfnt_off0000ff0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0A 5180 bytes
SHA-256: 1fbaf669b384debe1161a520115c54e5c5ef5a1c01ab47acda0a140a09054b05
font_03_sfnt_off00011088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11088 10396 bytes
SHA-256: 3a7b027b36377d67ba5c158a3386424e425afa0e76a3b401898abf364d62e18d

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