Malicious PDF — malware analysis report

Static analysis result for SHA-256 c41c46a9b3b7a64a…

MALICIOUS

PDF

73.1 KB Created: 2021-03-11 06:08:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: f4ef568f8b5731089b7a83c47e9d339b SHA-1: 4b9db3a2b0ab57267e625cf61e414a778878824e SHA-256: c41c46a9b3b7a64afec376e1f6550fcab6b46a5e9c40e899de5d8c8531706e39
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a potential phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests a link farm designed for SEO manipulation or to host malicious content, further supporting the phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/123?utm_term=addition+worksheets+for+first+graders PDF link annotation
    • https://fexaxotira.weebly.com/uploads/1/3/5/4/135401388/5116583.pdfIn PDF document text
    • https://ranefegol.weebly.com/uploads/1/3/4/4/134498511/pafozelex.pdfIn PDF document text
    • http://hhizmet.com/play_free_3d_train_simulator_games_onlineipjny.pdfIn PDF document text
    • http://xesapuwax.mywebcommunity.org/discrete_probability_distribution_formula_excel.pdfIn PDF document text
    • http://dotenipago.medianewsonline.com/53555034050.pdfIn PDF document text
    • http://alluniversity.fun/37987598926uqk3l.pdfIn PDF document text
    • http://iciko.xyz/paxafimepepipulqtghj.pdfIn PDF document text
    • https://sivipamekan.weebly.com/uploads/1/3/2/6/132682587/rawilotup.pdfIn PDF document text
    • http://wotukujis.sportsontheweb.net/tesugoje.pdfIn PDF document text
    • https://fexalikinuzumow.weebly.com/uploads/1/3/5/3/135324316/kekaj.pdfIn PDF document text
    • http://toxipoxekej.medianewsonline.com/80621862086.pdfIn PDF document text
    • http://neip-forum.fun/limelodibulegadi5f60s.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/tugabijenovili/lotefatanakigakov.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/gilakoji.pdfIn PDF document text
    • http://kijonag.onlinewebshop.net/32552629212.pdfIn PDF document text
    • http://rodedewezijore.atwebpages.com/56265895322.pdfIn PDF document text
    • http://feferabi.atwebpages.com/70636442537.pdfIn PDF document text
    • http://wufikemofumop.atwebpages.com/onkyo_tx-nr626_bluetooth_setup.pdfIn PDF document text
    • http://ligexaxo.epizy.com/the_neverending_story_song.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/holographic_will_template_alberta.pdfIn PDF document text
    • http://fusuzuveraku.epizy.com/12347415101.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_off0000e041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE041 5280 bytes
SHA-256: bbcb6e738b88c72c85a0cf48c8eb67d716f7efa44ece45d273d9544da4132805
font_01_sfnt_off0000f24a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24A 10600 bytes
SHA-256: 8be32099fa88d41004ef56fc9462f267219e11f34a527c2a9e7f4e69026c65b6

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