Malicious PDF — malware analysis report

Static analysis result for SHA-256 252aa81a68268a54…

MALICIOUS

PDF

75.1 KB Created: 2021-04-17 16:07:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c342111199e7958738f9a0b2c3d1b5c0 SHA-1: 7df216da32641d1befccf138b788372ef755c8cd SHA-256: 252aa81a68268a546c4332a4e941cb0dac409da2bbee6929a72a55abcdc2cf48
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URL pointing to a suspicious domain, likely intended to deliver a secondary malicious payload. The document body, though heavily obfuscated, suggests a lure related to home heating systems, aligning with common phishing tactics.

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://resalured.ru/strik?utm_term=how+to+set+up+home+heating+system
    • https://loligilifalo.weebly.com/uploads/1/3/0/7/130775627/xonaribev_vapikapuni.pdf
    • https://cdn-cms.f-static.net/uploads/4388614/normal_6015ad6214a44.pdf
    • http://baffer-shop.space/16293339188mic1p.pdf
    • https://static.s123-cdn-static.com/uploads/4419645/normal_5fe127ac3738b.pdf
    • https://cdn-cms.f-static.net/uploads/4486997/normal_5fd7f676287cc.pdf
    • http://goodsun.fun/how_to_use_bosch_laser_level_gll_50lnp7u.pdf
    • https://zaluzukefajol.weebly.com/uploads/1/3/5/4/135400247/8045610.pdf
    • http://lupobel.22web.org/mcdonalds_menu_prices_uk.pdf
    • http://vertitribe.store/springfield_87a_scope_mount7243n.pdf
    • https://static.s123-cdn-static.com/uploads/4464707/normal_60069e435ef9f.pdf
    • https://kidivine.weebly.com/uploads/1/3/4/5/134576756/ludug.pdf
    • http://opensalle.xyz/tamil_songs_online_oldpanli.pdf
    • https://static.s123-cdn-static.com/uploads/4425723/normal_5fdf2d8e9c2dd.pdf
    • http://nusamovepi.22web.org/arm_cortex_r52_technical_reference_manual.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zumezeviwakiz/medical_physiology_book.pdf
    • https://s3.amazonaws.com/sezewu/xapogukujigixasibitoxe.pdf
    • http://kubozivomojiva.epizy.com/osteoporosis_nice_guidelines_2017.pdf
    • https://s3.amazonaws.com/nowonovege/odisha_police_job_information.pdf
    • https://s3.amazonaws.com/selivuvumepaveb/kenwood_kdc-138_wont_turn_on.pdf
    • http://turikumulalevi.rf.gd/preparation_of_cycloalkanes.pdf
    • https://s3.amazonaws.com/muvarelo/factoring_quadratics_a_not_1_worksheet.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_off0000eb1b.bin
a38907430abd9e1b21bb39562270d04f1b4c0b83aa251508dd8c9cdcea59acf9
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1B 5260 bytes
font_01_sfnt_off0000fcf2.bin
790a46930378ae248fdd04a6048599dac8684b85e49444bf2e54f35b487ab32d
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF2 9896 bytes