Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ff888ed24e1aec7…

MALICIOUS

PDF

91.6 KB Created: 2021-03-30 21:12:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 161fcc7fa320a8b98d24b3ea041eeffc SHA-1: 7e8a3bc437e3165ecddec6cb65e79389026753ef SHA-256: 3ff888ed24e1aec7b0e8104802bd8cfa33be3f52b2158c81d78a9381ef5cba33
136 Risk Score

Malware Insights

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

This PDF document employs a social engineering tactic by presenting a common technical issue as a lure, aiming to deceive users into clicking a link. The embedded URL, https://ponafet.ru/strik?utm_term=my+magnavox+smart+tv+won%2527t+connect+to+wifi, is identified as a redirector, likely leading to a phishing or malware download site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://ponafet.ru/strik?utm_term=my+magnavox+smart+tv+won%2527t+connect+to+wifi PDF link annotation
    • https://cdn.sqhk.co/kugefiruxat/c7jgu0i/gilesivowipanazekuvofu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455406/normal_604bca99444d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491439/normal_5fc8e5113ebf2.pdfIn PDF document text
    • https://cdn.sqhk.co/sutadejuna/whjJ8hi/advertising_agency_internships_nashville.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385417/normal_6052fcbb2f3ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421460/normal_602dc95a62028.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411717/normal_605eed1c56695.pdfIn PDF document text
    • https://cdn.sqhk.co/jeforije/jjegfgj/webipolutekobepapanomun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411917/normal_6023f5881b302.pdfIn PDF document text
    • https://cdn.sqhk.co/matapolid/4ieijia/36510237398.pdfIn PDF document text
    • https://cdn.sqhk.co/momewoziwoge/iggjgzj/munisibejodarezune.pdfIn PDF document text
    • http://ginumon.iblogger.org/coliform_test_kit_lamotte.pdfIn PDF document text
    • http://kifuwuvejezowi.iblogger.org/zoxafosemezex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414334/normal_5fcbe70c91faa.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/zerepuzuze/jikopugesefi.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/rezabimadujozefav.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/form_space_and_order_in_architecture.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/33069775065.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/8493698839.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/types_of_interior_design_styles_2019.pdfIn PDF document text
    • http://reditavipesef.rf.gd/ldr_sensor_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/92676863558.pdfIn PDF document text
    • http://gajiresidar.epizy.com/information_report_structure.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_off0001198e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1198E 5320 bytes
SHA-256: 10a727e5fa93d5dcc5781700d9274370abe7fe0a475d1e931b53fad61122538c
font_01_sfnt_off00012bae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BAE 11404 bytes
SHA-256: 2a54211ec2176bd49a88d13e17d4f115f20440e5c2056a2e4accd42328a9f262
font_02_sfnt_off00015272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15272 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176