Malicious PDF — malware analysis report

Static analysis result for SHA-256 dace6afde3fa1f20…

MALICIOUS

PDF

75.3 KB Created: 2021-03-22 07:09:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e1b1f754f7d11ee7de9d973b6c90461d SHA-1: 5372c1a8ba08fd1223020e1e36327ac665c8978e SHA-256: dace6afde3fa1f206c7487c49e98f1e4188767b82aa276e8137db01142a91c75
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://bologen.ru/award?keyword=aphidius+sp+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4483070/normal_5fdf6a3228f4f.pdfIn PDF document text
    • http://gixodugesu.medianewsonline.com/how_do_i_program_my_spectrum_remote_ur5u_8780l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502248/normal_601ae4b9da093.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467274/normal_5fe0f1c777b8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368481/normal_60564484ed31f.pdfIn PDF document text
    • http://pisibebix.22web.org/minecraft_island_seed_1.15.2_java_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370074/normal_5ff1cf2c9590e.pdfIn PDF document text
    • http://misujupino.getenjoyment.net/50631920464.pdfIn PDF document text
    • http://fuvesozufinefi.medianewsonline.com/how_to_train_your_dragon_2_4k_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497369/normal_601cdaacc287d.pdfIn PDF document text
    • https://cdn.sqhk.co/letowajaf/ghhcRz2/botisajiwi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371497/normal_5fd869d3ae10d.pdfIn PDF document text
    • https://cdn.sqhk.co/fogibadeku/ggifiaV/buzzer_beater_nba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391642/normal_60079a36cd97f.pdfIn PDF document text
    • https://cdn.sqhk.co/mitugejaxel/sI8jdjb/zozodakujime.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ba30dffa-51fe-4caa-9472-6f142403a9bb.filesusr.com/ugd/c2007e_c274f98af6784f3e87ad1190cb5fb6bf.pdf?index=trueIn PDF document text
    • https://711920be-b761-4f0e-a604-762b26663b16.filesusr.com/ugd/ffcbea_1335f4b8d5b7421b88d82ad65480817e.pdf?index=trueIn PDF document text
    • http://nokefibazapowem.rf.gd/ordinal_numbers_1_100.pdfIn PDF document text
    • http://magajavopisili.epizy.com/attacking_soccer_drills.pdfIn PDF document text
    • http://nebakeditawow.epizy.com/daretajuroj.pdfIn PDF document text
    • https://73c25812-7308-4b32-b985-10e2a25710ca.filesusr.com/ugd/5b604d_5a2bbb8c56aa49ce8974f3c2aca15d8a.pdf?index=trueIn PDF document text
    • https://dca540c6-954d-4243-9f09-0921753db957.filesusr.com/ugd/974a4e_65b7abae4c514587b515008070b722e5.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e88c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88C 4780 bytes
SHA-256: 8c8c3fc203ad9cc73f1ff0d2a9349c94baf73d4826fd19e30105bd421043f0e4
font_01_sfnt_off0000f8d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D7 12272 bytes
SHA-256: f446c4ac2e30f189a443d9ced42dc717abca155ab7b74ee042c396dee20eec72

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