Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fe49637d73f9b5f…

MALICIOUS

PDF

83.2 KB Created: 2021-04-05 08:21:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22afae2941d84833ed5de6f661bd8ec8 SHA-1: ddca8ce470e14ce54999d36449dd5b0178238470 SHA-256: 6fe49637d73f9b5f98615947d18969a2b25a40d6f1a3d64b23265cdcd94ef694
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing attempt. It contains an embedded URI pointing to a suspicious domain, likely intended to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to 'quiz answers'. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dafemum.ru/123?utm_term=apush+chapter+3+quiz+answers
    • http://extrameets.fun/322944960463arr0.pdf
    • https://kezikiwagoxarud.weebly.com/uploads/1/3/0/7/130739267/2599f7c04da186a.pdf
    • http://itsnat.space/960574316407ovnl.pdf
    • https://static.s123-cdn-static.com/uploads/4502246/normal_5fc5a1bc7ce26.pdf
    • https://cdn-cms.f-static.net/uploads/4456391/normal_60489cf48ae86.pdf
    • http://13millions.store/asana_pricing_enterprise9azc8.pdf
    • https://cdn-cms.f-static.net/uploads/4408588/normal_60695e2c47394.pdf
    • http://pokemonrivals.online/what_is_an_sbir_grantg3ucn.pdf
    • https://cdn-cms.f-static.net/uploads/4459058/normal_60538a4a283ef.pdf
    • https://mufalugibesenu.weebly.com/uploads/1/3/1/4/131453255/d33d89a41.pdf
    • http://justamorem.com/singular_possessive_nouns_lesson_planspoq89.pdf
    • http://productwood.ru/945275325963u6k.pdf
    • https://cdn-cms.f-static.net/uploads/4456379/normal_604106e61aba6.pdf
    • https://rojurunonujimos.weebly.com/uploads/1/3/5/3/135325454/vaxadekok_soxiped_tarilirotujese.pdf
    • http://ig-objectionform.com/vexomajiluxevowevotinole5i1rv.pdf
    • http://korsabarca.com/39159534042y890m.pdf
    • https://biruvosuvibu.weebly.com/uploads/1/3/0/7/130739381/fokisulina.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://poxobigijeteri.rf.gd/44816515992.pdf
    • https://45ed8376-e832-497f-ab20-0a31924dc5db.filesusr.com/ugd/4b7290_b17baad64694497d952be2bd489257de.pdf?index=true
    • http://zutilafuje.epizy.com/jafesite.pdf
    • https://a540aa65-2eb1-4ac3-86d0-bf6a54daac96.filesusr.com/ugd/2d797c_3401487b1bf44f96bafb9679ac1d891c.pdf?index=true
    • https://47ab6ce1-aee6-4086-a8e7-31fe393d2411.filesusr.com/ugd/afbef4_9b9615ef029e4a949f5e307596fbf2ec.pdf?index=true
    • 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_off0001075b.bin
cc1a289a3fb4d885916878d0581724fd68d2f8ec25f7e1cdcd067fa0cdb9e0ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x1075B 5412 bytes
font_01_sfnt_off000119db.bin
bbd5f182290dbeadbdf4092e3c40a6a18bed3a908428b3c28fdd61e8ba608eaa
pdf-font-stream PDF embedded font (sfnt) at offset 0x119DB 10980 bytes