Malicious PDF — malware analysis report

Static analysis result for SHA-256 589f1370b8fecf79…

MALICIOUS

PDF

74.1 KB Created: 2021-03-10 09:38:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ced074d873592ad61aee98d8bc66aa0 SHA-1: 7465fd22f1153efc0dea49c6326b3c17d5d8b10c SHA-256: 589f1370b8fecf7958dbb248a42749856f4caf2839130435768a1efde6573e0a
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that masquerades as a search result, likely to trick the user into visiting a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the presence of embedded URLs and the nature of the heuristics suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/aws?utm_term=computer+science+illuminated+chapter+15+answers
    • http://xiravudes.22web.org/9981006495.pdf
    • https://static.s123-cdn-static.com/uploads/4369655/normal_5ffa9639e234f.pdf
    • https://static.s123-cdn-static.com/uploads/4366389/normal_5fe5d119230e7.pdf
    • http://xolokeminapi.getenjoyment.net/how_to_install_swann_camera_system.pdf
    • https://static.s123-cdn-static.com/uploads/4469836/normal_5ffa3ba81af3b.pdf
    • https://sifobidegi.weebly.com/uploads/1/3/0/8/130874382/55c3e.pdf
    • https://pisaxegeb.weebly.com/uploads/1/3/0/7/130775455/50b3bce74ca920.pdf
    • https://bosamekuxukis.weebly.com/uploads/1/3/4/6/134672370/bebeloxitiv-mevuzisarudisa-noxukazesi.pdf
    • https://gamajebijapam.weebly.com/uploads/1/3/1/8/131856653/tosaravoka.pdf
    • https://cdn-cms.f-static.net/uploads/4476938/normal_5fd1e198d9431.pdf
    • https://retevewaluwur.weebly.com/uploads/1/3/4/6/134600892/zopopubawadujifem.pdf
    • http://rowomonug.mywebcommunity.org/bubimukofegegirirab.pdf
    • http://fikodon.iblogger.org/jehovah_jireh_song_sheet_music.pdf
    • https://tupuzosajabol.weebly.com/uploads/1/3/2/6/132695591/3822997.pdf
    • http://kujunat.medianewsonline.com/62266862653.pdf
    • https://static.s123-cdn-static.com/uploads/4416136/normal_5ffe628001698.pdf
    • http://sewulege.22web.org/mujatixuwet.pdf
    • http://duwulavodawu.22web.org/6540102825.pdf
    • https://cdn-cms.f-static.net/uploads/4370266/normal_5fdc2d0a33ca6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d05d.bin
b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808
pdf-font-stream PDF embedded font (sfnt) at offset 0xD05D 6744 bytes
font_01_sfnt_off0000e142.bin
d4f71a64335cfe2de65f14f8bd3abf75482066cd025934de85d27aef7070285d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE142 5484 bytes
font_02_sfnt_off0000f3cc.bin
ddd5c42d6f03189750ab26b4ad694e735b34bc195fda930029c8cbb957927a5e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CC 10880 bytes