Malicious PDF — malware analysis report

Static analysis result for SHA-256 f05ed198e4bca50b…

MALICIOUS

PDF

65.5 KB Created: 2021-02-21 08:41:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 39e950b8a32cf73c7d62e087eebc049f SHA-1: 585ec891dc1dc3f5da6e47cc24a60bdb7912e8a0 SHA-256: f05ed198e4bca50b3f56da55ea9aca157fd9c74cabfcef3eedfe9cee08dfffee
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though truncated and obfuscated, appears to be a lure related to screen mirroring, likely intended to trick users into clicking the malicious links.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=how+to+screen+mirror+iphone+to+kenwood In PDF document text
    • http://sijowusim.22web.org/dififobadodet.pdfIn PDF document text
    • http://bawawurojetuve.22web.org/dirty_minded_riddles_with_answers.pdfIn PDF document text
    • http://tubajeroxe.iblogger.org/abbiamo_bisogno_di_informazioni_in_inglese.pdfIn PDF document text
    • http://1gusevshop.space/youtube_tv_guide_on_samsung_smart_tvhnrmn.pdfIn PDF document text
    • https://razitesewiwi.weebly.com/uploads/1/3/2/8/132815022/bdee6c.pdfIn PDF document text
    • http://gbarb.me/salus_rt505tx_receiver_manualsya0u.pdfIn PDF document text
    • http://tijatanilipe.iblogger.org/fekixazikunasurixewopog.pdfIn PDF document text
    • http://sujatafuluwariv.22web.org/40883140213.pdfIn PDF document text
    • https://texexavif.weebly.com/uploads/1/3/1/4/131454683/tusorupaperuj.pdfIn PDF document text
    • https://dabefetuxof.weebly.com/uploads/1/3/5/3/135320161/wetevepoza-sadopupanij-rojabiz-winif.pdfIn PDF document text
    • https://tazokadenu.weebly.com/uploads/1/3/2/6/132695553/8744719.pdfIn PDF document text
    • http://panedapupugaxe.22web.org/muxawirovil.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/kugelilizibuwum/16171906256.pdfIn PDF document text
    • http://kimaponupotowi.rf.gd/wovawaxej.pdfIn PDF document text
    • http://jogulele.epizy.com/warhammer_inquisitor_crafting_guide.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_off0000c553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC553 5188 bytes
SHA-256: a8aad9accf53bd658eed581f5ef44f3889b3bbaf5ecf77ef51abd31d7934a2da
font_01_sfnt_off0000d6de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DE 9864 bytes
SHA-256: 27fa01d1a0f6c4786ecf7093d7e6887e02f671b43a5ad8410621537a9653b715

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