Malicious PDF — malware analysis report

Static analysis result for SHA-256 73be27f062747ec7…

MALICIOUS

PDF

79.5 KB Created: 2021-03-19 00:14:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 405ff439997b6a45b3246fbd0c661e44 SHA-1: 234ad4876eaf3266f381b880e704438e03f268a2 SHA-256: 73be27f062747ec71bb67ccb50bcb4b670fc9a53b45ce7fdea3810117ffbe182
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, suggests a lure related to a 'calisthenics tutorial pdf', likely intended to trick users into visiting the malicious URL.

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://golowaki.ru/award?keyword=calisthenics+tutorial+pdf
    • https://cdn.sqhk.co/bimerolu/igtjjgd/61996008188.pdf
    • https://cdn-cms.f-static.net/uploads/4366982/normal_601a05f61f4fa.pdf
    • https://static.s123-cdn-static.com/uploads/4378619/normal_5fc9ae80e2ebb.pdf
    • https://cdn-cms.f-static.net/uploads/4414501/normal_6045321129f72.pdf
    • http://bizarur.iblogger.org/ashton_kutcher_wife_in_the_ranch.pdf
    • https://cdn-cms.f-static.net/uploads/4466676/normal_601df3bb17fee.pdf
    • https://cdn.sqhk.co/gedugari/xLIiahb/kotimogof.pdf
    • https://cdn-cms.f-static.net/uploads/4418184/normal_602cf697777d4.pdf
    • https://cdn.sqhk.co/navimoxa/efMg2gc/garmin_gps_europe_map_download_free.pdf
    • http://sodamasagu.66ghz.com/84247241469.pdf
    • http://vuzaretozo.iblogger.org/kofuwoveginoxofun.pdf
    • https://static.s123-cdn-static.com/uploads/4366961/normal_5fe2c360ee4ba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://54d25d35-1219-4e5f-97c3-905e72ea606f.filesusr.com/ugd/6d59ab_709a400575e144a687deb6b056fb808c.pdf?index=true
    • https://s3.amazonaws.com/lorifawuvawot/68511715609.pdf
    • https://s3.amazonaws.com/tazopaju/lens_mounts_guide.pdf
    • http://joxisuzu.rf.gd/vuzabo.pdf
    • https://82cb18f6-4a40-4824-ac11-10070f72ce02.filesusr.com/ugd/5aec95_5e5bb28dc9404d9fb729fae17436da42.pdf?index=true
    • https://40785fcd-1e5e-4316-9306-5db1d5795eae.filesusr.com/ugd/2f07a1_6cebb605bac048ba95f7ca595392d1e8.pdf?index=true
    • http://numorajigot.epizy.com/how_to_edit_a_in_canva.pdf
    • https://s3.amazonaws.com/widuxade/67634067822.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_off0000f8d0.bin
17be56274e2a76a101f5e9ea5dd8009a26e945ee83a73274aafd1cf5bb22191a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D0 5148 bytes
font_01_sfnt_off00010a48.bin
3c0c6b97d44752bba31ed10550cd508ed2f5eff323c4f7763269ceaf0945684a
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A48 11240 bytes