Malicious PDF — malware analysis report

Static analysis result for SHA-256 2635e48964c5da4a…

MALICIOUS

PDF

76.1 KB Created: 2021-02-23 13:04:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 33f5db810d309cc49664a7507ca14a69 SHA-1: 2c50533abd01af790829996639c0115ce0f6dcb8 SHA-256: 2635e48964c5da4af31d03e97c6bd7eed9f9e85b23de7458b089a92d334f9ac4
136 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing lure, specifically using an image to redirect users to a malicious URL. The ML classifier and ClamAV detection strongly support its malicious nature. The embedded URL, https://jottigo.ru/strik?utm_term=how+to+get+in+shape+diet, is identified as the primary indicator of compromise, likely leading to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://jottigo.ru/strik?utm_term=how+to+get+in+shape+diet PDF link annotation
    • http://molipetofokeva.22web.org/46686954844.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sojenozap/what_are_some_words_that_start_with_sat.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/car_market_valuation_report.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/63463228102.pdfIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/waxuwazalav.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/free_bootstrap_templates_with_contact_form.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/rakanijota.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/app_er_for_android_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/fotiwajatori.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/sharon_rogers_uniform_upgrade.pdfIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/dalezet.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/85142228291.pdfIn PDF document text
    • https://s3.amazonaws.com/fonibinaraj/ribenelized.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eefd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFD 5144 bytes
SHA-256: 8903fec904c0d95274692e58a67c203db441a5a86b0373218f1107e1188c9b86
font_01_sfnt_off00010096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10096 10308 bytes
SHA-256: fc07ccac1ba8f181a5045979478cc47606259dafb14cf80176d4bdb34841bbf3

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