Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a43626183d7d860…

MALICIOUS

PDF

76.8 KB Created: 2021-04-03 12:49:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7b744c6fdbed369339bce2697b341d9 SHA-1: 107f1e1381f4da0ba82d50996fc046048df6f797 SHA-256: 8a43626183d7d86099ef1294ad43d9d6663974d99fa3ce51fa6f8d88ef4b980b
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, likely intended to host a malicious payload or phishing content. The document body, though heavily obfuscated, suggests a lure related to 'database management system mcqs pdf'. No scripts were extracted, but the presence of an external URI and the nature of the detection suggest a phishing or malware distribution attempt.

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://xezojetit.ru/aws?utm_term=database+management+system+mcqs+pdf
    • https://cdn-cms.f-static.net/uploads/4466657/normal_600a3afbb7c2d.pdf
    • https://cdn-cms.f-static.net/uploads/4487658/normal_5fd9e138132c5.pdf
    • https://cdn-cms.f-static.net/uploads/4466679/normal_60103923da003.pdf
    • https://cdn.sqhk.co/wipedekis/fqjfjhO/wordful-_word_search_mind_games.pdf
    • https://cdn.sqhk.co/najuvotuwoz/7jcjati/xenakiwis.pdf
    • https://cdn.sqhk.co/livixugakuf/E35Euij/77602440516.pdf
    • https://static.s123-cdn-static.com/uploads/4495849/normal_5ff3641674e4b.pdf
    • https://cdn-cms.f-static.net/uploads/4491153/normal_600bfc14d8ab2.pdf
    • https://cdn.sqhk.co/xadeviro/haFPs4j/11938374960.pdf
    • https://cdn.sqhk.co/rabataxuvax/fohgEie/92308070726.pdf
    • https://cdn-cms.f-static.net/uploads/4492240/normal_604aa685549de.pdf
    • https://static.s123-cdn-static.com/uploads/4403283/normal_5fff9434ecd0d.pdf
    • https://cdn-cms.f-static.net/uploads/4493201/normal_604397ed8af83.pdf
    • https://static.s123-cdn-static.com/uploads/4407306/normal_5fdef53926e48.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e668754c-4151-464d-92c4-58f9a77ec2ab/86685506219.pdf
    • https://uploads.strikinglycdn.com/files/aa4484de-44ba-4cbf-b464-3f3c7a13705c/why_the_yellow_heart_on_snapchat.pdf
    • https://uploads.strikinglycdn.com/files/09733325-449f-41b7-a240-ca59802e5c32/94469838668.pdf
    • https://uploads.strikinglycdn.com/files/3514b496-b660-4b02-a9aa-e6e52f7d547a/piwawujiwedojozi.pdf
    • https://uploads.strikinglycdn.com/files/dcc0ef7d-4c9a-44f1-961d-6e63ed773b2c/beloved_audiobook_free_online.pdf
    • https://uploads.strikinglycdn.com/files/3daa2cb4-08ed-4d0e-b48e-496993bf4a3e/noco_g7200_genius.pdf
    • https://uploads.strikinglycdn.com/files/00d440a7-9000-4676-a710-e4bcce0de12c/aiag_ts_16949_lead_auditor_training.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_off0000ef3e.bin
a56904aa74d68118406ba97832d93159fdf0dc1b5967113df9cbb91a69d4bdcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3E 5712 bytes
font_01_sfnt_off0001029f.bin
75abd668f9fbe22af64d1a3cddb7b825e14224eb17c50bdd701abf7c1db4db08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1029F 10296 bytes

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