Malicious PDF — malware analysis report

Static analysis result for SHA-256 6457237b8323e79e…

MALICIOUS

PDF

85.4 KB Created: 2021-02-24 03:50:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: f545e78857d6634019d24077acb2a5c0 SHA-1: d62f64b62e5d5a68ad47662888e1f276448faff5 SHA-256: 6457237b8323e79e52f66dc2497d5a48f57779160ab0844561df9b72b8b53337
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with several pointing to known malicious redirectors and link farms. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to lure users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=history+of+the+world+in+100+objects+hardback In PDF document text
    • https://ponatuxo.weebly.com/uploads/1/3/4/5/134596183/44c750e.pdfIn PDF document text
    • http://helplnstagramcontact6088757.com/idsa_guidelines_mrsa_utihmqol.pdfIn PDF document text
    • http://getallcreditscores.info/conjunction_and_but_worksheets_for_grade_2srjt1.pdfIn PDF document text
    • http://natfreshik.fun/rap_lyrics_on_trial_answers6ub33.pdfIn PDF document text
    • https://nibuduki.weebly.com/uploads/1/3/5/3/135314859/1729059.pdfIn PDF document text
    • https://xefolulewonud.weebly.com/uploads/1/3/1/4/131406676/b9ece1272a19479.pdfIn PDF document text
    • http://plusstore.pro/26081056545ngaxt.pdfIn PDF document text
    • http://sqrab.top/gemavazeva81qgj.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
    • https://s3.amazonaws.com/divikufifir/58335450748.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/netevub.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/best_ringtone_songs_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/41594405609.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/vebiwadisino.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/sequoia_national_park_hiking_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/aarambam_friendship_song_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/77221878947.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_off0000ff3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3A 5524 bytes
SHA-256: 3b1b01aa7d2e92f1e451072a48414cf7bd651796d88a37d5a9e1c79184cfbcd2
font_01_sfnt_off0001120f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1120F 11308 bytes
SHA-256: 8580dbd233448b233ffbe65d8a11466897941e15af27303671fb4d1105b245ca
font_02_sfnt_off00013843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13843 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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