Malicious PDF — malware analysis report

Static analysis result for SHA-256 117ac6ae9f62a55c…

MALICIOUS

PDF

75.9 KB Created: 2021-02-28 05:50:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f8232cb4d1497d89be3dec08303bafea SHA-1: 2327b16e4cecd33e7dec07ac5b3e5aa4e3e185a3 SHA-256: 117ac6ae9f62a55c8f60fd741b537846f044e2b522b1246605303eee723e3ccf
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains a large number of external links, suggesting it's part of a link farm designed to manipulate search engine results or redirect users to potentially harmful content. The presence of multiple external PDF links on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://jottigo.ru/wix?keyword=digital+resources+at+pearsonrealize.com+answers+topic+2 PDF link annotation
    • http://creditscorerepair.info/how_much_does_it_cost_to_change_a_heat_exchangerssnrp.pdfIn PDF document text
    • https://supavutoni.weebly.com/uploads/1/3/4/7/134713891/1e2c207c28.pdfIn PDF document text
    • http://jakartapro.xyz/36687086389p48p1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482206/normal_5fdf877038c3b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470835/normal_5fed917c9d250.pdfIn PDF document text
    • https://xojajulu.weebly.com/uploads/1/3/1/3/131382271/ba084b567.pdfIn PDF document text
    • https://mifopubulu.weebly.com/uploads/1/3/1/6/131637027/667529.pdfIn PDF document text
    • https://rogapasutidubu.weebly.com/uploads/1/3/1/4/131438129/7174899.pdfIn PDF document text
    • https://negowuvezesat.weebly.com/uploads/1/3/4/8/134859399/meluboxesokipokit.pdfIn PDF document text
    • https://barobinamad.weebly.com/uploads/1/3/4/7/134756413/935e93f808da9.pdfIn PDF document text
    • https://sikowegapewabi.weebly.com/uploads/1/3/5/9/135975971/a8f3ab9faf3bed.pdfIn PDF document text
    • https://wivusogonelom.weebly.com/uploads/1/3/5/3/135310870/9164988.pdfIn PDF document text
    • http://trafikcezaodebayisi.com/benign_paroxysmal_positional_vertigo_home_exercisesps0qw.pdfIn PDF document text
    • https://rezepurobej.weebly.com/uploads/1/3/5/3/135327696/wavato_kurirudabekevi_pijixufemikif_jepux.pdfIn PDF document text
    • https://lixagomifele.weebly.com/uploads/1/3/5/3/135323016/5ccd7700.pdfIn PDF document text
    • http://viewcreditscore.info/double_down_saloon_las_vegas_happy_hour16p5r.pdfIn PDF document text
    • https://talovilivakalod.weebly.com/uploads/1/3/5/3/135326419/pupanorizibotexo.pdfIn PDF document text
    • https://gawufuxawejax.weebly.com/uploads/1/3/1/8/131855981/pijipose_xakanaduvizosa_wuruzuzefoxax.pdfIn PDF document text
    • https://livabobuladezer.weebly.com/uploads/1/3/0/8/130874084/memedadopisizis_zogegupafam_xajegaka_wuzata.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000eb4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4A 5560 bytes
SHA-256: a385e44555de50e7d7ce9f5903a51d3bf95dd4c01a6c0a8e4feae6b788da6b6c
font_01_sfnt_off0000fe4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4E 10408 bytes
SHA-256: bc3c1851597e35f3dd6914a028389d6a634915a0a52e2835007a2b911321cf78

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