Malicious PDF — malware analysis report

Static analysis result for SHA-256 1117f0a1fd49bb93…

MALICIOUS

PDF

76.9 KB Created: 2021-03-19 12:38:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b6cbe6d86657ac34728dcdf375ed887c SHA-1: 16093668d4bf8fc2938dab808379492a2fe060af SHA-256: 1117f0a1fd49bb938ce2115f35fa3dcbafdf188071dcde8d35359b53604e5b54
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 0.9997

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://nipisod.ru/wix?keyword=all+answers+to+cat+in+japan PDF link annotation
    • http://bionatur.space/formula_atlantic_4age_headudoiu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476947/normal_5fdb088ecc993.pdfIn PDF document text
    • http://meetchambre.xyz/arduino_uno_r3_schematic_ch340suixu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403808/normal_5fdea2d1b7543.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384817/normal_6038e1e93cf42.pdfIn PDF document text
    • https://cdn.sqhk.co/kenujowemi/iiqLhbd/what_the_fight_game_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495531/normal_601af3231187f.pdfIn PDF document text
    • https://cdn.sqhk.co/sixitigoxeto/h5Pr20Y/huey_s_burgers_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/zibusisujij/gfifici/betabufomubeki.pdfIn PDF document text
    • http://timecodes.net/74454943559qlyf6.pdfIn PDF document text
    • http://nazhivy.net/mastering_ansible_downloadw3jbx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/appareil_genital_masculin_et_feminin.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/roxevesasukalugere.pdfIn PDF document text
    • https://1fa67a36-2e8b-44cc-a955-751d80433762.filesusr.com/ugd/d85e51_d530c2ea96f640f39dfba443d032c491.pdf?index=trueIn PDF document text
    • https://e028ba52-6c86-493e-86b7-fecf7cd1c3eb.filesusr.com/ugd/bcb9fd_2d58a050249147ebb11f70156c5736ac.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dudurat/pamowebewepipifovavoxubuf.pdfIn PDF document text
    • http://tifijawubizomed.epizy.com/vizio_sound_bar_manual_bluetooth.pdfIn PDF document text
    • http://turixupifebut.epizy.com/how_do_i_know_what_generation_kindle_fire_i_have.pdfIn PDF document text
    • https://23751d96-d7b3-42ca-b8ca-e459b671ea95.filesusr.com/ugd/7de994_34e02e5c9c824eda81c16207d437dc1a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ritoma/91261942047.pdfIn 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_off0000efe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE0 5084 bytes
SHA-256: b06c397bcd510a7ac5d904adf95df6a46bc412cbaa3aaaf00755c4fdc974e53d
font_01_sfnt_off0001014f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1014F 11112 bytes
SHA-256: 39bf96aa779bd82b7d2e683c5021a0e98656dac58e4064c8abe62b7eb5d0fb71

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