Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a804c190eecb898…

MALICIOUS

PDF

79.1 KB Created: 2021-02-26 01:44:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 12e9b2bc833692540517a255abc38b02 SHA-1: 65d360f41434db9c10194bf74f4f19cf1301b0ca SHA-256: 4a804c190eecb898aa89928bed896e3434e8df7a30eb8bf07e0822047edf9721
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The embedded content, though partially obfuscated, suggests a lure related to product reviews. The ML classifier and ClamAV detection strongly support the malicious verdict. No scripts were extracted, but the presence of malicious URLs is a high-confidence indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://yafferge.ru/award?keyword=are+lg+top+load+washers+good In PDF document text
    • http://ridunculus.com/77701448317ui5am.pdfIn PDF document text
    • https://cdn.sqhk.co/bumadawab/ZhbNgh4/best_no_crop_app_for_instagram_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/kepilujofeje/lgcUkgT/97420732227.pdfIn PDF document text
    • http://idealslim-italiaoficial.site/88519884642urkru.pdfIn PDF document text
    • http://help-feedback-amzn8.xyz/true_to_the_game_3_book_summaryow7xp.pdfIn PDF document text
    • http://1xbets-reg.site/piwudukowesotugevebipixezr3zrx.pdfIn PDF document text
    • http://lotto-investclub.com/gujarat_mitra_surat_epaper_date_wisegu3zl.pdfIn PDF document text
    • https://cdn.sqhk.co/pujapipiwat/jbq9hfj/scontro_tra_titani_2_streaming_cineblog01.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxovunevo/Vijzxp3/kofofa.pdfIn PDF document text
    • http://allostar.buzz/what_causes_calluses_on_your_toes38nin.pdfIn PDF document text
    • http://trixy-matrix.space/flammable_liquid_storage_cabinet_250l248i1.pdfIn PDF document text
    • http://znatural.space/formation_agent_commercial_immobilier_pole_emploi0slo0.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/guwutivupudutu/what_are_empty_calories_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/transformers_prime_optimus_prime_toy.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/rapprochement_bancaire.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/flipping_death_ps4_trophy_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/mafevaxuwameritusiren.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/16007164106.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_off0000ecc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC0 4936 bytes
SHA-256: c9d94b9a72ad9df5538d5ce22afd0842e2a6fecd728fd139e18d45ac695984f4
font_01_sfnt_off0000fdad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAD 10476 bytes
SHA-256: 07ea5b4c46d84df4ef4c726a535f3b2e7d2e78d66be49009a2b011d5025d9042
font_02_sfnt_off00012184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12184 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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