Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaacc707c2e7a260…

MALICIOUS

PDF

76.1 KB Created: 2021-03-27 17:19:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9607eb3fac92854f2a197aee09a4f19 SHA-1: ddb7965c3ee5bf01de6d5b4ebd10ce1724b30320 SHA-256: aaacc707c2e7a260d15f2662cf46cd80e0232a7b22bcdb9ecb3902be5921abcd
154 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, pointing to various PDF documents. The primary external URI, 'https://fokemale.ru/award?keyword=norma+aisi+316l+pdf', suggests a potential phishing or SEO manipulation tactic. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification further supports its malicious nature. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6727

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://fokemale.ru/award?keyword=norma+aisi+316l+pdf
    • https://cdn.sqhk.co/benibavagoge/aygfJZe/miraculous_ladybug_and_cat_noir_the_gamer.pdf
    • https://cdn-cms.f-static.net/uploads/4464527/normal_5fda4af4474ed.pdf
    • https://cdn.sqhk.co/mepofazobi/hihjgii/fikimigirawutebizizofij.pdf
    • https://cdn.sqhk.co/zoluxoni/dAia5hh/71201723868.pdf
    • https://cdn-cms.f-static.net/uploads/4414680/normal_6057b122b5531.pdf
    • https://cdn.sqhk.co/lanumakefu/dRhjieC/radio_online_streaming_jakarta.pdf
    • https://cdn.sqhk.co/woluzadeviv/tAiiHia/ny_and_company_curvy_jeans.pdf
    • https://cdn.sqhk.co/gigemuji/jeigiaf/nolifa.pdf
    • https://cdn-cms.f-static.net/uploads/4373526/normal_5fd3357b231a9.pdf
    • https://cdn.sqhk.co/kitujesijak/eYRRCha/minerva_mcgonagall_harry_potter_cosplay_costume.pdf
    • https://cdn-cms.f-static.net/uploads/4407733/normal_6026f1df5874d.pdf
    • https://cdn.sqhk.co/sefibenip/HAghbgf/free_android_online_emulator_apk_online.pdf
    • https://cdn.sqhk.co/fazologim/jfy0Ygf/selfie_bebo_sambalpuri_song_video.pdf
    • https://cdn.sqhk.co/bapisolel/Wjcieg2/online_airtel_dth_recharge_login.pdf
    • https://static.s123-cdn-static.com/uploads/4420470/normal_5fdd3ffd08504.pdf
    • https://cdn.sqhk.co/divojimo/dQQchhj/23373271535.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/bd659ff1-d553-4472-a333-c8f362b55c6a/memories_bring_back_lyrics_and_chords.pdf
    • https://c01188fd-d8af-4b86-846b-090f7ecd58d8.filesusr.com/ugd/9058e5_923fe91b10ac4d8ebfe8a185cd3eeac5.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1875e510-1c0f-46af-ba6f-777ddc5a908d/percy_jackson_the_last_olympian_quotes.pdf
    • https://21e323bd-7fdd-46e9-a6c7-4880e76d7610.filesusr.com/ugd/0a51c1_556a76ec454a47cc9e882cd97f0f4ef2.pdf?index=true
    • https://baad1762-ad72-434c-be9a-9de7d8068d01.filesusr.com/ugd/61395f_2cab5105c1d6414da9c5aee278ba1357.pdf?index=true
    • https://uploads.strikinglycdn.com/files/439bdb98-25d1-431d-b57d-e0042eb75dac/10674783056.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebd4.bin
d2fd0a0c4ab4258597c3566339cdd584c09cb5c668e04921224e533e728ee324
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD4 5012 bytes
font_01_sfnt_off0000fcd0.bin
80b5d64371a10b3d65c1b1827209de323c3eb8ccf367e35aec24fbe7bc5bcdc8
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD0 16000 bytes