Malicious PDF — malware analysis report

Static analysis result for SHA-256 171d1a2469f3950b…

MALICIOUS

PDF

74.5 KB Created: 2021-03-13 19:49:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 3f1ef43ddfc46312115e4b2619bffc4a SHA-1: 82f9a3cecb769b37574332f25d2e8ad980b4c4e8 SHA-256: 171d1a2469f3950b448458a4f61f4f26f6e88cb05d84a429a16ff35785e97f9d
126 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs, with one specifically referencing 'forgot yahoo email password reset', indicating a phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the presence of external URIs and the overall structure point towards a phishing lure designed to harvest credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://maypoin.ru/wix?keyword=forgot+yahoo+email+password+reset PDF link annotation
    • http://ledy66.net/pelobulejobebofufiykqyj.pdfIn PDF document text
    • https://cdn.sqhk.co/nujorazaje/TjeNhiZ/my_bitcoin_address_btc_wallet_is_1n6dubqfmnyq2qdwvi32ppvbc3kkmtycgw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366654/normal_5fd5f3a21922e.pdfIn PDF document text
    • https://miroguwitofenev.weebly.com/uploads/1/3/5/9/135958286/6ed170.pdfIn PDF document text
    • https://cdn.sqhk.co/talexadu/zrnhi75/zawig.pdfIn PDF document text
    • https://cdn.sqhk.co/dodirijobadi/jb5hjha/82878407738.pdfIn PDF document text
    • http://kvadro63.ru/lg_stereo_headset_hbs_900_manualu8joe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492588/normal_5ff166beacf40.pdfIn PDF document text
    • https://favobilumosuxo.weebly.com/uploads/1/3/4/7/134733594/taborofomud.pdfIn PDF document text
    • http://shmelev.pro/fazutoxuzegojko3bs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451023/normal_602428f1a88ab.pdfIn PDF document text
    • http://espaceabone.com/kings_of_capitalism_appw5kru.pdfIn PDF document text
    • https://cdn.sqhk.co/jedelamodafa/2tharja/minecraft_education_edition_gameplay_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419430/normal_5fda6c7ce4e52.pdfIn PDF document text
    • https://cdn.sqhk.co/xupodafib/gj4KI6u/starlight_cinemas_drive_in_brea.pdfIn PDF document text
    • https://pawiwojofidinof.weebly.com/uploads/1/3/4/4/134458390/5167444.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495254/normal_5feddca28d8a5.pdfIn PDF document text
    • https://jononosafopobof.weebly.com/uploads/1/3/4/6/134649788/7088870.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zagofij.onlinewebshop.net/81169849604.pdfIn PDF document text
    • http://zijiwaras.onlinewebshop.net/89200750387.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fd9e755-8aab-466b-86f3-67dc5bb6ba28/74582430805.pdfIn PDF document text
    • http://dolanuvusipegu.myartsonline.com/startup_owners_manual_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaaabbda-4427-4baf-87d3-bf6b599e008c/alphabet_phonics_sounds_chart_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cec68114-9681-4e73-b481-9bf6ce082a1c/rovuvoworibuvakumimebefel.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_off0000e2a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A1 5520 bytes
SHA-256: 3f9c01abbbb41c340598eb7f388c02d097c673530ec64b162312c517278a98e7
font_01_sfnt_off0000f558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF558 11032 bytes
SHA-256: 5bd24126b3551a22443fa2bbbfe5bc68d9c49eacc6ebe9b7920771cf43efd130

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