Malicious PDF — malware analysis report

Static analysis result for SHA-256 a615ad8f48c8f229…

MALICIOUS

PDF

79.8 KB Created: 2021-04-04 20:09:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f879f9b58b0ec0040559b4224e161d6c SHA-1: 5bbe830c7dd9419ccbd4554b96086eb8e2862a26 SHA-256: a615ad8f48c8f2293b65c25cedb2aaa599bec9b401dcc8a35478dc68a5219e95
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'resalured.ru', which is likely used to host a malicious payload or phishing page. The document body, though heavily obfuscated, suggests a lure related to chemical equations, aligning with the phishing technique.

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://resalured.ru/award?keyword=lista+de+balanceamento+de+equa%25C3%25A7%25C3%25B5es+quimicas+pdf
    • https://static.s123-cdn-static.com/uploads/4451760/normal_6006174f7ae7d.pdf
    • https://cdn-cms.f-static.net/uploads/4470038/normal_601e11101eea2.pdf
    • https://fatumusuwenufok.weebly.com/uploads/1/3/4/5/134578353/lezawo_lowopix_fufefafod_sodelilorinof.pdf
    • http://oneshops.space/dinidapajirozifopitotw2bl.pdf
    • https://pinozawekik.weebly.com/uploads/1/3/4/5/134589254/19def1.pdf
    • https://static.s123-cdn-static.com/uploads/4416493/normal_600263217e231.pdf
    • https://zitadinenere.weebly.com/uploads/1/3/1/8/131871439/702434da7a66a9b.pdf
    • http://ewwe.space/70103440752ci12x.pdf
    • http://euroshopmn.space/wows_conqueror_guidee061u.pdf
    • https://cdn-cms.f-static.net/uploads/4446512/normal_6064aad8cafb9.pdf
    • https://ruwatija.weebly.com/uploads/1/3/4/8/134846771/xakuvik.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jigezilor/pokemon_gba_emulator_for_pc_free.pdf
    • http://valumaj.epizy.com/pisag.pdf
    • https://7292b199-6d7c-4e84-b646-7854114497ba.filesusr.com/ugd/53361e_7d4d49c1f41f4d389b0fff648123e6e7.pdf?index=true
    • https://s3.amazonaws.com/kefiperizonofu/wafitumi.pdf
    • https://s3.amazonaws.com/potofaw/factors_affecting_bacteria_growth.pdf
    • https://89e5ed4a-33eb-42a6-b5f1-9fc07ea1e15b.filesusr.com/ugd/ff68bb_8c2a3d59ec8b4164bb7d4f62ef8c54ae.pdf?index=true
    • https://0ed7c29b-d5f2-4290-8b47-add6aa38300d.filesusr.com/ugd/32a223_69914576656d44fc83104977ba4aa298.pdf?index=true
    • http://koxevopigi.epizy.com/wavuzos.pdf
    • https://s3.amazonaws.com/gonafoziguwewe/71038780927.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_off0000f4c6.bin
1b71243482270345fb7630442fd4dc6c9334701635b2b3c9c15fff6e02c2324b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C6 5812 bytes
font_01_sfnt_off000107f1.bin
7397cec560b9844f232e77dadb16eea954797a032f85c32a9914579d2d06196b
pdf-font-stream PDF embedded font (sfnt) at offset 0x107F1 12912 bytes