Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ecfdc4c3782e4fc…

MALICIOUS

PDF

84.1 KB Created: 2021-03-16 00:51:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 4e745df66ef4784fb851953b72616506 SHA-1: 9dfef26b1ec0445381f623388eba2b9c9d68864d SHA-256: 7ecfdc4c3782e4fc79b72c451fbe1c46aa9e0505e77b3b81937e45058acad586
136 Risk Score

Malware Insights

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

The PDF document contains a heuristic firing indicating it is an SEO redirector link for free-download phishing. The embedded URL, https://druttle.ru/123?utm_term=consumers+report+magazine+phone+number, likely leads to a malicious site. ClamAV also detected this file as Pdf.Phishing.Trojan, further supporting its malicious nature. While no scripts were explicitly extracted, the PDF structure and URL suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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://druttle.ru/123?utm_term=consumers+report+magazine+phone+number PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384647/normal_6011731d28d10.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487424/normal_5ff65195c942b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417815/normal_6008f78d98357.pdfIn PDF document text
    • http://bafiselavanebep.mywebcommunity.org/53323297642.pdfIn PDF document text
    • https://cdn.sqhk.co/dexediwiboze/cjcia8d/weekender_travel_bag_with_shoe_compartment.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378161/normal_5fd92ab938e60.pdfIn PDF document text
    • http://xalowazejadiv.getenjoyment.net/4262325047.pdfIn PDF document text
    • https://cdn.sqhk.co/fefamuve/hfifj5i/candy_skull_coloring_book.pdfIn PDF document text
    • http://xutefizil.getenjoyment.net/13574552370.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384154/normal_604bb5b887961.pdfIn PDF document text
    • https://cdn.sqhk.co/xovikojux/sjfVCgg/agar._io_vs_slither._io_vs_diep._io.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383698/normal_6010d4ff40bad.pdfIn PDF document text
    • https://cdn.sqhk.co/wakivugex/gDNLhgT/best_deals_on_tvs_today_uk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391314/normal_5fcc8d12b507b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422180/normal_5ffc8e4ea6414.pdfIn PDF document text
    • https://cdn.sqhk.co/rasepotobami/aCnaB0y/21347779210.pdfIn PDF document text
    • http://pobunav.sportsontheweb.net/mikoxigonazibonu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416939/normal_60084174432f7.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://e57d8632-f742-4524-ada6-9cdf759d9f13.filesusr.com/ugd/b0cb2d_18706e138dff4395856aced15c49a3bc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/bollywood_movies_website_name_list.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/difficult_interview_questions_and_answers.pdfIn PDF document text
    • https://b64dd490-e5b9-492f-89ff-e398ecee904c.filesusr.com/ugd/5926b4_8174d4d6a30342029da0b98b2346ee01.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/narasimham_malayalam_movie_mp4.pdfIn PDF document text
    • https://26f2e344-8444-46ea-90c9-5a893bcc2fb3.filesusr.com/ugd/b8c837_768e625c62194b819a21e1b444445bfd.pdf?index=trueIn 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_off0000fb58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB58 5296 bytes
SHA-256: 52c5a4e70cc8d6f5c501bf2ae779fa95f28538008407e33db273178ca7c4ca22
font_01_sfnt_off00010d2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D2F 10868 bytes
SHA-256: 168c6f241de2d15caa8358e90d0cd70144f2f276aa7a14d6cac32578b11be471
font_02_sfnt_off00013259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13259 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361