Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bcb1bf16e61c50e…

MALICIOUS

PDF

71.5 KB Created: 2021-06-12 07:48:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c57b2a38a822c7a661c218f1203796eb SHA-1: c8b24a996c309bbe2788fef4f67fd090934750c8 SHA-256: 1bcb1bf16e61c50e6ff01d6298ea0a823a20f1a58286979d99290aafd0b2f4e3
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 0.9998

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://allytemp.ru/pbw?utm_term=movie+box+apk+free+download PDF link annotation
    • https://nakidero.weebly.com/uploads/1/3/4/5/134524904/xazujixuf-rewojematad-gewofe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388596/normal_5fff332f69c82.pdfIn PDF document text
    • https://xopilujipuwoka.weebly.com/uploads/1/3/4/8/134886601/lufob-rewanufibibu-zexozijigizimug-fasifajezete.pdfIn PDF document text
    • https://fogerasiro.weebly.com/uploads/1/3/4/3/134328851/454b95b5.pdfIn PDF document text
    • https://pukewuvidepuf.weebly.com/uploads/1/3/4/3/134321324/kigajakujira-baxediduvawafa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496586/normal_602793d99ca67.pdfIn PDF document text
    • https://gewefasawetuje.weebly.com/uploads/1/3/5/3/135315234/sapoziwijivon-beravowado-lixina.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486981/normal_6010aed728f1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457590/normal_60135934eba08.pdfIn PDF document text
    • https://generixa.weebly.com/uploads/1/3/5/3/135350481/mubagav.pdfIn PDF document text
    • https://gujibimusexuwub.weebly.com/uploads/1/3/4/0/134042380/patubefo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jolowajuwijo.pbworks.com/w/file/fetch/144855039/how_to_cite_graphpad_prism_7.pdfIn PDF document text
    • http://javopurutoz.pbworks.com/f/42945661968.pdfIn PDF document text
    • http://ziduzobif.pbworks.com/f/jagabijakon.pdfIn PDF document text
    • http://negovijalulu.pbworks.com/w/file/fetch/144418476/what_does_ch_mean_on_lg_air_conditioner.pdfIn PDF document text
    • http://zekapotog.pbworks.com/w/file/fetch/145118517/pafujazaki.pdfIn PDF document text
    • http://bukafag.pbworks.com/f/the_power_of_prayer_and_fasting_marilyn_hickey.pdfIn PDF document text
    • http://xoxafepapesu.pbworks.com/f/werewolf_the_apocalypse_second_edition.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_off0000db2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2E 5284 bytes
SHA-256: 09659645d8fba4397f5fd1ff669d770c0db7f4168ac49324427e16fb9b3ab028
font_01_sfnt_off0000ed5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5B 10468 bytes
SHA-256: b2539ca9804d55284552ff21e66863541a8371a7e35ab7499de758fcefc4c0b2

Open this report in the interactive analyzer, or submit your own file for analysis.