Malicious PDF — malware analysis report

Static analysis result for SHA-256 892f922ad9f09113…

MALICIOUS

PDF

76.6 KB Created: 2021-03-16 19:26:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: c429d9360e7e59ca329d1ba9b6b5dd91 SHA-1: 747f4b5bf1f58d4a3359f3a41355d6d6646b3337 SHA-256: 892f922ad9f0911367e1064b146ba1f0b833f537fac5a3bd4d1d248037622107
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The heuristic firings indicate the document is designed to link to external malicious infrastructure, likely for phishing or to download further malware. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://crophysi.ru/wix?keyword=word+that+starts+with+g+and+ends+with+y In PDF document text
    • https://laxaxaxiw.weebly.com/uploads/1/3/4/5/134528460/2698713.pdfIn PDF document text
    • http://jifarobajis.sportsontheweb.net/carbs_in_dunkin_donuts_bagel.pdfIn PDF document text
    • http://gejikojaki.scienceontheweb.net/xoramoganolovedox.pdfIn PDF document text
    • http://jewogipuwivi.medianewsonline.com/81576619893.pdfIn PDF document text
    • https://gilemana.weebly.com/uploads/1/3/5/3/135319463/3592274.pdfIn PDF document text
    • https://sibitolifi.weebly.com/uploads/1/3/4/7/134732274/9869332.pdfIn PDF document text
    • https://fowaloxew.weebly.com/uploads/1/3/4/8/134881160/8563984.pdfIn PDF document text
    • http://xufuxenu.mypressonline.com/barron_s_mathematics_study_dictionary.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
    • http://kadoxosin.atwebpages.com/how_do_you_play_trouble_warp.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/jidonanixirumepeget.pdfIn PDF document text
    • http://vawirir.atwebpages.com/zelajopefiwoxeze.pdfIn PDF document text
    • http://rujidafedisezu.atwebpages.com/review_label_makers.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/duxawepusi.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/bharat_gas_connection_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/senanilenipexuser.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/ankush_raja_2019_video_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01dfdeb8-f3ef-47e4-b61e-dde6a505546f/hp_8600_printhead_amazon.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/reddit_android_games_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b79bf38b-9eff-45a7-912e-9cb86ff5d284/audio_drivers_download_windows_8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e1816e6-447c-4356-ac73-6ce62d76a111/the_tempest_sparknotes_translation.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/64328544653.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_off0000e33a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33A 5052 bytes
SHA-256: 64118eea78ace62c8b895e5256489f5c2f932db3f7576262b1a75e585ee18a22
font_01_sfnt_off0000f481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF481 10004 bytes
SHA-256: d37c7049de4edec4a42496cdc29d94b8f73f60489e4740cf34ebe9b03302bcc5
font_02_sfnt_off000116cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116CB 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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