Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e22c1a71691d656…

MALICIOUS

PDF

73.2 KB Created: 2021-03-12 00:28:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 034b68e0afe06f96cfab3875ea56a03c SHA-1: 11c7bfba078dab91b84bb3e61bccbf789694c15d SHA-256: 1e22c1a71691d65603433642eabcc48b1d516702b5ce93cbc213145ea3e106d3
146 Risk Score

Malware Insights

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

The PDF contains malformed streams and is flagged by ML classifiers and ClamAV as malicious, indicating it's designed to exploit vulnerabilities or deliver a payload. It includes numerous URLs, suggesting a link farm or redirection mechanism to a malicious site, likely for phishing or malware distribution. The presence of embedded JavaScript, though not fully analyzed, further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://botokaw.ru/award?keyword=loop+antenna+design+pdf PDF link annotation
    • http://zizodoroluxonaf.sportsontheweb.net/28018107938.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387716/normal_5feb15b52c3bd.pdfIn PDF document text
    • http://doordash.fun/jandy_aquapure_troubleshooting_manualf5epf.pdfIn PDF document text
    • http://wotukujis.sportsontheweb.net/5035947293.pdfIn PDF document text
    • http://wersita.fun/pedagewuvalizawebab7vxk.pdfIn PDF document text
    • http://raxewaponoxiv.mygamesonline.org/30751453209.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490720/normal_601a0ef78f509.pdfIn PDF document text
    • http://bet-info.ru/xememibibokexogigztusv.pdfIn PDF document text
    • http://itdiscounts.pro/babofedetibarovew3ofn.pdfIn PDF document text
    • http://wirobigi.medianewsonline.com/hobart_handler_140_for_sale_craigslist.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392857/normal_603832b7594b2.pdfIn PDF document text
    • http://tesugujinarijag.mywebcommunity.org/o_que_comer_para_no_engordar_na_menopausa.pdfIn PDF document text
    • http://vuwimoxit.mygamesonline.org/newusokevipokufup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482023/normal_5fdd96e01fe61.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fejonaxi.myartsonline.com/zotobuvigu.pdfIn PDF document text
    • http://namepafubi.atwebpages.com/what_is_going_on_outside_the_capitol_right_now.pdfIn PDF document text
    • http://filosoko.onlinewebshop.net/jeppesen_instrument_commercial_manual_free_download.pdfIn PDF document text
    • https://ffb80149-315c-4936-8637-e87477b606fc.filesusr.com/ugd/e7410d_cbf3a53676b2417b92e1029cca988a61.pdf?index=trueIn PDF document text
    • https://f8ba888e-8f71-4fde-8303-550399648f4e.filesusr.com/ugd/17ce20_5abb02d25ba141db99b36d08d5679b99.pdf?index=trueIn PDF document text
    • https://0b609444-e5a2-4a7e-9779-a3c6bae51a53.filesusr.com/ugd/529dbf_d297910e13a2434a9574749c831f500d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e95a1f3a-2c60-4aae-bd9c-2810f8bb5c65/wolf_gourmet_countertop_oven_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0793a80-e351-411a-8c02-02785dab500b/what_reading_level_is_diary_of_a_wimpy_kid_the_meltdown.pdfIn PDF document text
    • http://vupaguriwedizid.atwebpages.com/95560723789.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_off0000e22b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22B 5024 bytes
SHA-256: 696d8ebcd56c220000845ba27cb5e42835e5511bd84b9598ffdcd06176c5a071
font_01_sfnt_off0000f364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF364 10724 bytes
SHA-256: b6c3483df545dfb1863f1c0c7f139f88c0473d662c5d4a686e58370b1529cbc4