Malicious PDF — malware analysis report

Static analysis result for SHA-256 18b9679fa22a67e0…

MALICIOUS

PDF

76.9 KB Created: 2021-03-14 06:28:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 810b305567e419ce6c6b53b9ba57598f SHA-1: 144537edc84c4f9c0247a88c2fcfb7cc54f950c2 SHA-256: 18b9679fa22a67e0754792299c4cf96dbd099d26bbdc7540ed61d0fbee7d067e
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 6

  • 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
  • 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://jumiwimov.ru/strik?utm_term=into+the+abyss+movie+3 PDF link annotation
    • http://vittorguxx.site/total_gym_xls_spare_parts_australiat84wj.pdfIn PDF document text
    • http://businessoutsourcing.info/dead_trigger_movie_2017_downloadscgr6.pdfIn PDF document text
    • https://tadomowiwelam.weebly.com/uploads/1/3/4/7/134744739/toruk.pdfIn PDF document text
    • http://ejqy.com/81803523100loj4j.pdfIn PDF document text
    • https://lesesagipamagaz.weebly.com/uploads/1/3/0/7/130739561/bac0174b72370b5.pdfIn PDF document text
    • https://libadelalisam.weebly.com/uploads/1/3/4/5/134579317/561697.pdfIn PDF document text
    • http://kalavar.xyz/jolelizegibbxwx0.pdfIn PDF document text
    • http://alifan.store/27856188178og57d.pdfIn PDF document text
    • https://tajuwelaf.weebly.com/uploads/1/3/1/0/131071184/lododuvodulufilo.pdfIn PDF document text
    • http://kezosod.iblogger.org/pit_bike_replacement_engine.pdfIn PDF document text
    • https://rikekipodoze.weebly.com/uploads/1/3/0/7/130776447/005309d4512e5.pdfIn PDF document text
    • https://galidenik.weebly.com/uploads/1/3/1/8/131856819/dasegodimarul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://78e27e65-9996-4239-a63d-7a21722db537.filesusr.com/ugd/03f576_c951d56a547045e392d213bbf3b13ebe.pdf?index=trueIn PDF document text
    • https://937a8a2d-b41a-4163-aff8-eda6db263557.filesusr.com/ugd/21e6f2_f5cc871dc8c2400e99c934eed2009185.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/589790fc-cb5a-49cf-845c-49c90745be72/jixovipenox.pdfIn PDF document text
    • https://70848fb0-0fd0-490a-9360-2ffa38fc212c.filesusr.com/ugd/08e331_8a4c8aca6076492c9bb412e583087138.pdf?index=trueIn PDF document text
    • http://jonizuxupofewow.rf.gd/58334953606.pdfIn PDF document text
    • http://tukemujixoku.rf.gd/microsoft_hyper_v_server_2016_installation_guide.pdfIn PDF document text
    • https://656adf98-7a81-40bd-8d0f-2b9c27d09201.filesusr.com/ugd/268ab1_0e318066a2a94850aaa38a906d44ead7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd4b2244-3aa0-482b-8bee-8cc56d378a77/parse_json_in_asp_net_c.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddb28123-7951-4a3b-9e9d-9a87e253a903/the_chocolate_war_manipulation_quotes.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_off0000efe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE1 5200 bytes
SHA-256: 4eadf2ca5d315d1bc7194e5025decec2959b55993bd64feadf4f86b1f32df4c7
font_01_sfnt_off0001017a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1017A 10956 bytes
SHA-256: 30e597e25966c59503ea089b4018f1f9c1a4cb4e0fa55089c3121eb7c1caf17a

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