Malicious PDF — malware analysis report

Static analysis result for SHA-256 32f582e5b7b6ee86…

MALICIOUS

PDF

78.8 KB Created: 2021-03-20 22:07:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 917eae661e697987469c33216b7244e4 SHA-1: a53135d4624e7218959a69441b54f86de9ce1f98 SHA-256: 32f582e5b7b6ee861c3a2a60472dfd57716f45ae105a5b9f67a4ed5bc2b042f0
154 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_SEO_LINK_FARM, indicating it hosts a large number of external links. The embedded URLs and the document body, though heavily obfuscated, suggest a lure related to 'ganoderma lucidum cultivation pdf'. The ML classifier and ClamAV detection further support its malicious nature, likely as a phishing or content distribution mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8494

Heuristics 4

  • 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
  • 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=ganoderma+lucidum+cultivation+pdf
    • https://kanamatadu.weebly.com/uploads/1/3/4/3/134366206/pavaxexedatirinojo.pdf
    • http://eslife.pro/why_does_my_water_heater_pilot_light_keep_turning_off5hgkd.pdf
    • http://my-credit.info/systemverilog_for_verification_3rd_edition_downloadz8dhu.pdf
    • http://mixit.info/is_killing_eve_on_netflix_uk63q6u.pdf
    • http://muldwych.com/sowejugowujelek6elg.pdf
    • http://cg-designer.xyz/uniformly_accelerated_motion_worksheetw43j5.pdf
    • https://monowulesamewul.weebly.com/uploads/1/3/2/6/132682048/7613862.pdf
    • https://bivitomelonex.weebly.com/uploads/1/3/4/4/134491730/fesub_dazatebik_texujadopepi_bixugolinidid.pdf
    • http://azalea.store/marketing_director_jobs5oyus.pdf
    • http://stroymarketmetal.ru/93596631358u04uk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://44eeb0f0-4dc9-4d8b-b3fd-cc7ace98e90e.filesusr.com/ugd/a083a1_3161f09fada147e19b9bf411106b449b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/660f0213-7493-42c0-868a-3b5bcadc1c54/does_10k_gold_turn_black_when_burned.pdf
    • https://uploads.strikinglycdn.com/files/e9b60a09-f1e6-473a-a2cc-ee908a13794d/how_to_connect_hp_p1102w_to_wifi.pdf
    • https://uploads.strikinglycdn.com/files/e306bb8a-d6b0-49f4-8290-171cb3194e7e/schlage_keyless_entry_deadbolt_not_working.pdf
    • https://uploads.strikinglycdn.com/files/742924f2-765c-4768-b34d-871bcf1949a2/39550877317.pdf
    • https://uploads.strikinglycdn.com/files/b3c0d7c0-3c0e-45ce-9127-3f4fc7880b03/8756528366.pdf
    • https://f77c8dad-41d7-4a8f-8d8d-c05149a3a236.filesusr.com/ugd/36d413_312c24a95902463ab9e6e9fba11632eb.pdf?index=true
    • https://0dd0cd87-80d3-4eb5-b9c6-73c43c3a6fca.filesusr.com/ugd/f0b6b3_f8bf64c82aef452eb9638039d67e8654.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5e92f047-1192-4a0c-99bb-0998019aa089/ninagax.pdf
    • https://uploads.strikinglycdn.com/files/db61e3be-2ee7-40d7-85da-e8044c2c9703/cen_tech_battery_charger_replacement_parts.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010405.bin
f5781fa4daaaf53c8523d6517f471876629d730a9a6709a38f64d51c33430af3
pdf-font-stream PDF embedded font (sfnt) at offset 0x10405 5212 bytes
font_01_sfnt_off000115bb.bin
4c895d182c3dfc5edac7df1fc9a4e0461fee985f6679a5d6148c010d5fbe88b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x115BB 11496 bytes