Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3ba6a63c319d1aa…

MALICIOUS

PDF

80.7 KB Created: 2021-03-23 23:44:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65d695552add04e3c8830e726f45dc99 SHA-1: 23d44ea865b2862e191cb83950ae478c9adb1610 SHA-256: a3ba6a63c319d1aae4d1c7f356f84c5e2648113b04aa807f9ebc9262eeee2dcc
126 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous embedded URLs pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests a lure related to 'security impact analysis'. No scripts were extracted, but the presence of multiple external URIs strongly suggests the document is designed to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/strik?utm_term=what+is+a+security+impact+analysis
    • http://sdorovie-sustavi.xyz/14476119641jz6uv.pdf
    • https://vuginavoji.weebly.com/uploads/1/3/0/7/130775358/402596.pdf
    • https://vetigepar.weebly.com/uploads/1/3/5/9/135989985/47e1e36b674.pdf
    • https://rinavupitaf.weebly.com/uploads/1/3/1/1/131164375/dakuzewubijalu.pdf
    • https://tudexabi.weebly.com/uploads/1/3/4/7/134770635/250a99ce2ffb.pdf
    • http://todayit.pro/ps4_slim_disc_not_ejectingc96rn.pdf
    • http://ductsunlimitedins.com/gixilidaxijajowededakadcwy8.pdf
    • http://verenica.net/adding_and_subtracting_algebraic_fractions_with_like_denominators_worksheety6rky.pdf
    • https://cdn.sqhk.co/nobixapo/FibjilT/pifix.pdf
    • http://help-copyrightviolationhelpcenter.com/30717849322g9m3l.pdf
    • https://cdn.sqhk.co/gibebomesani/QCiajdR/ludo_parchis_classic_online_pc.pdf
    • https://cdn.sqhk.co/tuwodemo/iajaPrd/lexukik.pdf
    • https://cdn.sqhk.co/guranotup/Hlji0gh/dragon_raja_director_good_or_bad.pdf
    • https://lelunoforonu.weebly.com/uploads/1/3/1/6/131606056/sedavaxuzinalokiporo.pdf
    • https://japidofig.weebly.com/uploads/1/3/4/5/134503064/2161359.pdf
    • http://deutschebank-meine.com/smok_x_priv_software_update6a88l.pdf
    • https://setabuzi.weebly.com/uploads/1/3/0/7/130775645/viranalop.pdf
    • https://dapobirot.weebly.com/uploads/1/3/4/8/134888013/dedevenezuwugajo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/wewiro/90144541843.pdf
    • https://s3.amazonaws.com/fekazudabo/barozamizexupudo.pdf
    • https://s3.amazonaws.com/dorobukasawituw/mubiviwu.pdf
    • https://s3.amazonaws.com/sejakopa/aldea_global_definicion.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f29c.bin
a80690b12adf17fb4e0c61461b15c23ab948eeb1002ddd8cbf1846ff53545599		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF29C 5060 bytes
font_01_sfnt_off000103b9.bin
c0fb1d5f6922d1abc56584195832b5d925030abca44748b7dc7063eb5be4ca65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103B9 10496 bytes
font_02_sfnt_off00012758.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12758 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.