Malicious PDF — malware analysis report

Static analysis result for SHA-256 7884b2cd5f70dfca…

MALICIOUS

PDF

76.5 KB Created: 2021-03-19 07:31:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ba76e40ae0815cef04280ee89275ace0 SHA-1: 2572964578d3633f0601f91148a69e4303b10045 SHA-256: 7884b2cd5f70dfca903a08439ef85e762372061d92ab470505b4705c4a9fadd7
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://xezojetit.ru/strik?utm_term=explain+the+sunspot+cycle PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4480387/normal_5fcd33c3c7ef9.pdfIn PDF document text
    • http://witikotuxigere.scienceontheweb.net/vavufaxixapuko.pdfIn PDF document text
    • http://vumonivaxozutod.mypressonline.com/barujilakugivanalojisowi.pdfIn PDF document text
    • http://siwivelijutore.medianewsonline.com/biblia_reina_valera_1960_app_para_pc.pdfIn PDF document text
    • http://pedumerik.sportsontheweb.net/gone_michael_grant_online_book.pdfIn PDF document text
    • http://fivadoguna.medianewsonline.com/rixigenefuvafavugijupotud.pdfIn PDF document text
    • http://patajafurep.mywebcommunity.org/hydraulic_bearing_puller.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385412/normal_5feb7453d1b55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505159/normal_6012c199eb2a0.pdfIn PDF document text
    • http://pivojowemetobiv.mywebcommunity.org/what_are_the_best_golf_apps_for_iphone.pdfIn PDF document text
    • https://giburonolunege.weebly.com/uploads/1/3/1/4/131406036/2453481.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390996/normal_603ddd7d216c1.pdfIn PDF document text
    • http://rozogididibusar.sportsontheweb.net/tratamiento_de_bartolinitis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425511/normal_602d43825b861.pdfIn PDF document text
    • http://desokore.medianewsonline.com/fuxaxogijolutejexan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404964/normal_601ef781b496e.pdfIn PDF document text
    • http://delinapod.mypressonline.com/zafazuwu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369631/normal_5fc5c653d9596.pdfIn PDF document text
    • https://tazesarazuf.weebly.com/uploads/1/3/4/7/134726557/tisizexenujinevo.pdfIn PDF document text
    • https://xifupanudolegu.weebly.com/uploads/1/3/1/1/131164204/fegemokamux_tadadavuxo_faforede.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bigamutalunu.atwebpages.com/catalogo_mary_kay_julio_2020.pdfIn PDF document text
    • http://gepivefukusi.atwebpages.com/pefapujanibexezumuxujusip.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_off0000efcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCB 5052 bytes
SHA-256: 6565a52257756a4941061e3f0006b2a359f4467944083b179d41ef449b400ba4
font_01_sfnt_off00010106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10106 10512 bytes
SHA-256: 9b1c2b2435365183f9c7cc077756a9d3b46a9b3e1ca67e2e05bd82edd02575d4

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