Malicious PDF — malware analysis report

Static analysis result for SHA-256 78d7dd99089ba87f…

MALICIOUS

PDF

65.4 KB Created: 2020-12-17 19:47:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 04667c996d758b8180b0775a65200adc SHA-1: b6a25152b59bcbe0e10ee3f86a004de79a14147d SHA-256: 78d7dd99089ba87fba5683d5f713d2e7460224234d3a37f8e3e89f104106f773
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, with a high risk score. It contains an embedded external URI pointing to 'https://trafftec.ru/strik?utm_term=shimazu+shave+ice+school+street', which is a strong indicator of a phishing or malware distribution attempt. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the external URL and the overall malicious verdict strongly suggest a phishing or malicious content delivery vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafftec.ru/strik?utm_term=shimazu+shave+ice+school+street PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374199/normal_5f8a33750eca6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480149/normal_5fad936db98a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413977/normal_5f9c0de7d73c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423460/normal_5fa9467fc928e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373301/normal_5f90da4f638e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384142/normal_5f9d8e74bd6c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384633/normal_5f9d081b27bdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471235/normal_5fa5c734a1a34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446489/normal_5f9eaa08e172e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xeponodij/kadamban_movie_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/projeto_meio_ambiente_em.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/51966718510.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/29493760127.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10561405d5340f32a3b3e/t/5fc976d9ab0d1a26d95e7f21/1607038684674/juventus_fc_injury_news.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce873aa1a48d6bfa9bf7ad/t/5fd145f2491f844c08184d27/1607550451760/how_to_raise_my_child_s_self_esteem.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

Related samples 2

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b8ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8BA 5252 bytes
SHA-256: 362cb7721901c15a3f17c305cb6a99f3fea062407690090b6788c3cc4204fe1d
font_01_sfnt_off0000ca6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA6B 2320 bytes
SHA-256: ce3e0ccb4cee1870febff05b2a026ef6fd2be74ce04423378c8340e175d90b25
font_02_sfnt_off0000d4f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F9 10404 bytes
SHA-256: 8620e5cb3af5a450e555b14e97c3926e09821a7f6fd696786cc45497f35f844c

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