Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed4d70aec2880d17…

MALICIOUS

PDF

77.4 KB Created: 2021-04-09 02:46:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a515ac4c791a2aa27e7b15f0069b82ae SHA-1: 9ce7f1a1df1e16d31327f4a50d97d8d95497b064 SHA-256: ed4d70aec2880d174348cad9acc7df9e7bf4c795dfe0ac13dc9618e89f17a056
126 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 link farm on disposable hosting, suggesting a malicious intent to redirect users. The ClamAV detection and ML classifier strongly indicate a phishing or trojan payload. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a common phishing lure, likely leading to a second-stage download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/strik?utm_term=unspoken+feelings+of+a+gentleman+ii PDF link annotation
    • http://wepijafiguwenan.mywebcommunity.org/lavujonafej.pdfIn PDF document text
    • http://tophomework.space/volapobifogesimew3chl2.pdfIn PDF document text
    • http://mp4.design/tivepipufoxugativexikek3jbs.pdfIn PDF document text
    • https://zobatovegu.weebly.com/uploads/1/3/0/8/130873738/xumusugu.pdfIn PDF document text
    • http://pawusewi.sportsontheweb.net/abc_murders_agatha_christie.pdfIn PDF document text
    • https://tifegoguxefufi.weebly.com/uploads/1/3/1/6/131637953/1863365.pdfIn PDF document text
    • http://kirudikegopoded.sportsontheweb.net/bulenadekopopomutixufave.pdfIn PDF document text
    • http://bristol-yalta.run/kasibotiwudiravoraboxetaquy.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • http://leledup.mypressonline.com/is_magic_bullet_as_good_as_nutribullet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/33b5707f-9922-4005-9554-a7f887c844d5/dnd_character_sheet_word_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18f3486c-a6eb-42f9-afa6-63901bdf34c1/garp_frm_exam_dates.pdfIn PDF document text
    • http://ditanumugagoma.myartsonline.com/mixoxibosiminu.pdfIn PDF document text
    • http://suziwifu.rf.gd/rc_yowhatsapp_ios_7._90_apk.pdfIn PDF document text
    • http://kusofiwu.epizy.com/sujefifewi.pdfIn PDF document text
    • http://wazuvit.rf.gd/tom_and_jerry_cartoon_tamil_video.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/86387307468.pdfIn PDF document text
    • https://s3.amazonaws.com/gupojakami/very_difficult_riddles_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad5aa1ee-4bb8-4b16-8c40-abab55a44f2b/82793541852.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67c81ffc-70d1-480a-961a-02189e631ac6/what_do_blocked_milk_ducts_look_like.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3553ece1-7562-4138-95ff-620b6270d079/448778274.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_off0000f1ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CA 5180 bytes
SHA-256: 793930b778ba78ac48cc80d6618461940cfc3850780f9368aebdcb50e1ce17d4
font_01_sfnt_off0001036d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1036D 11028 bytes
SHA-256: ccafb359ac5c66afe81b507694961cfa6d8b5ed64e5f383d6ef7d83693f1ef4b

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