Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d61a47eb4584c34…

MALICIOUS

PDF

69.2 KB Created: 2020-11-25 20:46:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 4466704752e4fc160757317f3e70ec93 SHA-1: 2d9b8dcf18107d97abfe8376870092adc7efa360 SHA-256: 1d61a47eb4584c3497dc2d5a5c895ba6587d230a203a639eeb863e8ce52130d4
254 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm, indicating a phishing or scam attempt. The ML classifier also strongly indicated maliciousness. The embedded URLs, such as 'https://traffmen.ru/strik?utm_term=rochester+indiana+white+pages', are likely part of a campaign to drive traffic to malicious sites. No scripts were extracted, but the structure suggests a malicious document intended for initial access via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffmen.ru/strik?utm_term=rochester+indiana+white+pages In PDF document text
    • https://vuzejugusu.weebly.com/uploads/1/3/4/4/134486163/0ea79c5.pdfIn PDF document text
    • https://xaviwemegegel.weebly.com/uploads/1/3/4/8/134859007/da8ddf2.pdfIn PDF document text
    • https://wagizubim.weebly.com/uploads/1/3/4/4/134470033/zinusuxutub.pdfIn PDF document text
    • https://jimigafekalese.weebly.com/uploads/1/3/1/4/131407537/nukixunuxutogev.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/latufenaw/forms_of_communication_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/avast_secure_browser_setup.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/cv_templates_in_word_document_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/61697668945.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/illinois_state_background_check_form.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/baidu_wifi_hotspot_para_android.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/waves_vocabulary_worksheet.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c28a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC28A 5188 bytes
SHA-256: 92d705a80c9d9c2a11553414e8faf97a4c9af1091fea332030469a53e3429859
font_01_sfnt_off0000d437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD437 10644 bytes
SHA-256: 14a8f0b92d8b1b3288ff62a2c67b5319dd1d572e1dfc36966a7555e020c440c7
font_02_sfnt_off0000f8ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AD 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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