Malicious PDF — malware analysis report

Static analysis result for SHA-256 998a383992460754…

MALICIOUS

PDF

80.5 KB Created: 2020-12-02 09:44:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: e8fa6233070d10ccb10ab4fd25d146cc SHA-1: 15802df1266211fe3fb20e28ce1ca4a4f8f6fbe8 SHA-256: 998a383992460754865b01403cf8faff5b850a6078908f42e16370daa57f67d7
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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://traffking.ru/strik?utm_term=aptoide+apk+old+version In PDF document text
    • https://rofexigu.weebly.com/uploads/1/3/0/7/130738805/wagodabamiwulunuze.pdfIn PDF document text
    • https://safikevobajegev.weebly.com/uploads/1/3/4/3/134352312/fosigibesot.pdfIn PDF document text
    • https://vezorobabuwej.weebly.com/uploads/1/3/0/9/130969079/golenusasek-mugobawo-nolupux-zabuxul.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://static1.squarespace.com/static/5fc0eab716f6d44b07bedc8b/t/5fc15df7f81c9a2a0cd5466a/1606508025249/harvest_moon_friends_of_mineral_town_walkthrough_indonesia.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/pikaxexaxixus.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/fovapubidifivovivivoluj.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/article_370_upsc.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/puduvidajetomulakizuzukis.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/avira_antivirus_free_trial_90_days.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc18b2c68612547ed62b026/t/5fc2f9f8cb3e0f5771b29fee/1606613496939/dejabezojuxazefa.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/ddo_epic_tr_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/bunetewalokarifur.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB1 4856 bytes
SHA-256: 8013b3872532b745f4ce5696b162624ad434ac8c08eac51cd690aaf8a7c5f41f
font_01_sfnt_off0000ed38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED38 10764 bytes
SHA-256: 4db67ce023b0928c0b2fb9f7b54dfdb900af806e629215e562c8419d17a5f1b8
font_02_sfnt_off00011211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11211 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848
font_03_sfnt_off000126d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126D9 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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