Malicious PDF — malware analysis report

Static analysis result for SHA-256 f99e422b78e6ffc2…

MALICIOUS

PDF

79.6 KB Created: 2021-03-12 09:42:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b69dd25771cbed2d8f152eaf13889875 SHA-1: 9c0feda1d3468e2e94cef1c37d0916bd00837384 SHA-256: f99e422b78e6ffc2715e3500947ecdc2256715d523d13f26211bbbdbb42d202d
134 Risk Score

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 and presents a deceptive download button. 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-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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ponafet.ru/strik?utm_term=tp-link+tl-wr841n+v9+manual PDF link annotation
    • https://votokivefanatu.weebly.com/uploads/1/3/1/4/131453133/sibujepi.pdfIn PDF document text
    • http://bitejes.iblogger.org/53057173303.pdfIn PDF document text
    • http://micrometer25bill.site/regina_olson_hughes_known_for25x7i.pdfIn PDF document text
    • https://cdn.sqhk.co/kalijada/LZgfjcD/mewe_app_reviews.pdfIn PDF document text
    • https://rizipopene.weebly.com/uploads/1/3/5/3/135316145/xetadawu.pdfIn PDF document text
    • https://gegoviboz.weebly.com/uploads/1/3/4/8/134876631/529903.pdfIn PDF document text
    • https://cdn.sqhk.co/keridola/fzeD23x/xexonefefuzipawopa.pdfIn PDF document text
    • https://pupiwukonavi.weebly.com/uploads/1/3/2/6/132682553/voxejipifave.pdfIn PDF document text
    • http://raliwoze.iblogger.org/29809485032.pdfIn PDF document text
    • http://igcopyrightforhelps.com/difference_between_bose_companion_2_and_201kxtq.pdfIn PDF document text
    • https://muverope.weebly.com/uploads/1/3/0/7/130776407/detamo.pdfIn PDF document text
    • http://nncucuucuc.space/linear_equations_word_problems_worksheet_answers6xecp.pdfIn PDF document text
    • https://paxolobiwoke.weebly.com/uploads/1/3/1/1/131163878/namopa.pdfIn PDF document text
    • https://cdn.sqhk.co/definuseju/iege9if/85877259032.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vifowas.epizy.com/aprende_a_dibujar_comic_download.pdfIn PDF document text
    • http://jupasugego.rf.gd/how_to_clean_lint_filter_whirlpool_washing_machine.pdfIn PDF document text
    • http://jonebitomire.rf.gd/86330141439.pdfIn PDF document text
    • http://jenesigafepi.epizy.com/gutogifuzonegatetis.pdfIn PDF document text
    • http://molodetagako.epizy.com/vajezovelod.pdfIn PDF document text
    • http://xawunivirufoz.epizy.com/away_in_a_manger_song_lyrics.pdfIn PDF document text
    • http://raduniti.epizy.com/causes_and_effects_of_globalisation.pdfIn PDF document text
    • http://xejojud.epizy.com/how_to_write_an_introduction_paragraph_examples.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBF 5128 bytes
SHA-256: 90831107d6e16187d7cf2e733c4f367c5141a1435d1cc1308ff3fd2f4127d1d7
font_01_sfnt_off0000ff2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2C 10736 bytes
SHA-256: 9122add4840ce7f826950278d3e9dc083e1a8c651a5f6fb2aad0e98523f87799
font_02_sfnt_off000122e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122E4 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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