Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0728c8b4aafdab3…

MALICIOUS

PDF

80.6 KB Created: 2021-03-31 06:08:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7db41b898f78ccce6894adb9ca8cd795 SHA-1: d2c6aaf18aef89877c4494661708218cc2dcf71d SHA-256: b0728c8b4aafdab3faaef760bed8b5604974401cec4d82564e416a553b0171f2
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO spam or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the PDF structure and external links suggest it's designed to redirect users to malicious sites, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://botokaw.ru/award?keyword=caroling+caroling+pdf
    • https://cdn.sqhk.co/gizukakom/jHKMjhj/jujutogejakube.pdf
    • https://cdn.sqhk.co/daxegajok/hg1iiqC/76754356883.pdf
    • https://cdn.sqhk.co/ligumorik/higgijk/diwozivenekusu.pdf
    • https://cdn.sqhk.co/pilozarager/hifhjih/whispers_of_a_machine_walkthrough.pdf
    • http://belldiscount.ru/9239610762ufwi5.pdf
    • http://stroy-level.ru/delonghi_room_air_conditioner_costcotypz0.pdf
    • https://cdn.sqhk.co/gobajejuz/g2QvjgS/rarenasukinajelil.pdf
    • https://cdn.sqhk.co/kodivitedi/fjgexid/wokaxerifarafutopivuda.pdf
    • https://rekeboko.weebly.com/uploads/1/3/4/8/134899800/dezafet.pdf
    • https://ruxunomitebapat.weebly.com/uploads/1/3/1/6/131606858/kirimug_kiganu_wawejowugometi.pdf
    • https://cdn.sqhk.co/rewakevutel/jazjdGH/rimukadudigitad.pdf
    • https://redoperi.weebly.com/uploads/1/3/4/6/134686713/jepokebim.pdf
    • http://mkuu.club/92200860089qneor.pdf
    • https://pemugaladesav.weebly.com/uploads/1/3/5/3/135307247/9fe564a65e9280.pdf
    • https://nokurujifeseg.weebly.com/uploads/1/3/4/3/134355409/xuviwu_lujewoxuvasa.pdf
    • http://gufutaca5.xyz/criminalistics_an_introduction_to_forensic_science_13th_editionywis0.pdf
    • http://subfamjtii.site/cyberpower_cp1500pfclcd_pfc_sinewave_ups_system_review8v1f4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6f81cef9-66a2-447d-9e1d-4c0427ef15c5.filesusr.com/ugd/4d935e_0ccba27b61c844579fe88d23e1fa23aa.pdf?index=true
    • https://e824aeac-d22a-4b45-bb3c-17051d6ee04f.filesusr.com/ugd/de60da_764a0d9fd69043fcbcfe7e5bdd0c410c.pdf?index=true
    • https://be9c8297-50e9-4ec8-be22-7cc4068ef96a.filesusr.com/ugd/fc3b0b_881ddecec46849eeb408ed033188e755.pdf?index=true
    • https://ca483b97-61ac-4196-bca0-6b249c18eca9.filesusr.com/ugd/b27199_36fbb609513d4c9da864e3046726b9c0.pdf?index=true
    • https://d99d9bf7-a5e0-49f2-90ac-0d1bc881463d.filesusr.com/ugd/0182ef_4af1cfffec4c488f8be539720191c342.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e882.bin
2178981bc2882759d6574f679fcf8a5aedaf85dc050e3b3cfbf400a43d30a378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE882 5048 bytes
font_01_sfnt_off0000f9bd.bin
99f9fd0969199471a816001da311afd6bb9b66e5a707a1ec2cc4046fbb04d4df		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BD 11040 bytes
font_02_sfnt_off00011f83.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F83 16204 bytes

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