Malicious PDF — malware analysis report

Static analysis result for SHA-256 04c080718bf5d06e…

MALICIOUS

PDF

77.8 KB Created: 2021-04-07 05:21:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ce17fe11970239ae5859e10a46e956f2 SHA-1: 5b2de8af48e1acbd31ca2f372482c7aeeff81bf1 SHA-256: 04c080718bf5d06efb79b24bae01d3d3c3d1ee6e9746569eef25cb9d1932da97
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 0.9995

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://nipisod.ru/award?keyword=pengertian+national+interest+pdf PDF link annotation
    • http://lazadacostumercenter.com/what_does_biannca_prince_do_for_a_livingoljsh.pdfIn PDF document text
    • https://mamotuzukaw.weebly.com/uploads/1/3/4/4/134438076/8575047.pdfIn PDF document text
    • http://geponimodenebev.22web.org/59099029398.pdfIn PDF document text
    • https://jiromozuno.weebly.com/uploads/1/3/5/3/135387519/a92d7384e98.pdfIn PDF document text
    • https://mogeletonedilo.weebly.com/uploads/1/3/1/4/131482944/1338304.pdfIn PDF document text
    • http://remontlegko.info/bibubabapil47gc5.pdfIn PDF document text
    • http://gevejune.iblogger.org/81078712083.pdfIn PDF document text
    • https://gejowarog.weebly.com/uploads/1/3/2/7/132740172/lutifatisedut_dezazijowekew.pdfIn PDF document text
    • http://sandiego-podcasts.com/dnd_5e_crit_ruleshlo5g.pdfIn PDF document text
    • https://wakaxizuso.weebly.com/uploads/1/3/5/3/135322555/fasutegiwuver_kovuj.pdfIn PDF document text
    • https://ragusixiseditof.weebly.com/uploads/1/3/0/8/130814169/0c2f3.pdfIn PDF document text
    • https://puzomukasudugun.weebly.com/uploads/1/3/4/8/134865935/fekabu-katidanamoj.pdfIn PDF document text
    • https://lomewulepizava.weebly.com/uploads/1/3/3/9/133999744/manuxanuvawoteki.pdfIn PDF document text
    • http://instapriz24.online/kesedapik64qcg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sizabo/the_girl_with_the_dragon_tattoo_2018_cast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbb2765b-9426-4d76-9c28-62ed591a9798/32803025749.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/aadukalam_tamil_songs_starmusiq.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72789f4a-c35d-4a02-9b60-9df9eec2827f/how_to_find_4_digit_code_on_amazon_fire_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/fumeruzuzavarubazafuxa.pdfIn PDF document text
    • http://suvokejixu.epizy.com/beowulf_michael_morpurgo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b653f1f-c1e3-44f9-b65f-97665a4b8021/how_to_change_time_on_mantel_clock.pdfIn PDF document text
    • http://lafeseg.rf.gd/xokifiji.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_off0000f3f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F0 5212 bytes
SHA-256: 8fa9cb43169c3e99592c4c844bc149872452f2f04fc67d7e255d38d8463ef3fa
font_01_sfnt_off000105bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BB 10436 bytes
SHA-256: 6dfcad961422db92a95e6f522f086f72d081cea2e607f8c06fbc9f39ecee66df

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