Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fa336e92983d7bc…

MALICIOUS

PDF

83.6 KB Created: 2021-03-03 22:50:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c6512175c2befba3b7f6e345b83bfb49 SHA-1: f0b73af10a0147c140935fdfd0bc1f52da3bf07c SHA-256: 1fa336e92983d7bc134d6300dacdd96a09cdb690c1d3da26fab13beaf9147ccf
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8892

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gimoguvi.ru/aws?utm_term=ulysses+poem+tennyson+analysis PDF link annotation
    • https://cdn.sqhk.co/munuluxel/Hhiiahb/91832500538.pdfIn PDF document text
    • https://cdn.sqhk.co/daborofus/gggjVgi/zawetirekotitarugu.pdfIn PDF document text
    • https://xufizuwerab.weebly.com/uploads/1/3/0/7/130738786/3c0cb80adaca.pdfIn PDF document text
    • http://1cats.space/alchemy_emperor_of_the_divine_dao9w796.pdfIn PDF document text
    • https://cdn.sqhk.co/wudajelu/9ifgfih/best_pvp_decks_duel_links.pdfIn PDF document text
    • https://tobejisexin.weebly.com/uploads/1/3/1/4/131454505/2667033.pdfIn PDF document text
    • https://cdn.sqhk.co/sopiloroda/0igjigi/zepinikumer.pdfIn PDF document text
    • https://cdn.sqhk.co/fetedudi/f79Hjgp/38638952447.pdfIn PDF document text
    • https://cdn.sqhk.co/vodadavubex/eExljdy/bird_live_wallpaper_with_sound.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491934/normal_5feb2c117b7e5.pdfIn PDF document text
    • http://pedalini.club/family_feud_fast_money_questions_and_answersg9vpe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392649/normal_5ff151589b1e9.pdfIn PDF document text
    • https://cdn.sqhk.co/muvotugi/g7MO6LZ/kediperefivagetadogejunok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445129/normal_5fd5f2dc4242f.pdfIn PDF document text
    • https://cdn.sqhk.co/burajugi/iYhijnI/scary_granny_doll_the_horror_game_videos.pdfIn PDF document text
    • http://goodxday.xyz/252337762sxscz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://palelezugob.onlinewebshop.net/black_and_decker_8_cup_food_processor_fp4150bc.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001272c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1272C 4964 bytes
SHA-256: 5cec14e3c7092a338d1f1a4261c60d3acbf9c6bd37484dec11b6372bf152280c
font_01_sfnt_off000137fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137FE 6664 bytes
SHA-256: c0bd4021a6a2e3f142337b306b5f04a77d240d26ed3a1dd3e285b1c3d9cd2ec9

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