Malicious PDF — malware analysis report

Static analysis result for SHA-256 72f89ee590a20ee1…

MALICIOUS

PDF

86.8 KB Created: 2021-03-10 15:49:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3a52d57f62935c1b5ce3b2bae6f450cb SHA-1: 9b2e0584b03ba9f123ce47e36f5bf5109b80094a SHA-256: 72f89ee590a20ee13d6cf28a829bce9729cc3520a7b7693813ce6523ff030fd0
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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.
  • 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://resalured.ru/strik?utm_term=bob+evans+christmas+dinner+menu+2020 PDF link annotation
    • http://vivekawiga.sportsontheweb.net/kizogawajajupa.pdfIn PDF document text
    • https://cdn.sqhk.co/towinomer/iajfKIS/jikodog.pdfIn PDF document text
    • https://cdn.sqhk.co/govamopega/iarVhgf/the_last_survivors_game_poki.pdfIn PDF document text
    • http://medemukiduba.sportsontheweb.net/2020_tesla_model_3_long_range_mileage.pdfIn PDF document text
    • https://cdn.sqhk.co/fisejadiruw/iaNUchf/hd_nature_wallpapers_1920x1080_for_mobile.pdfIn PDF document text
    • https://xemivonosinuvi.weebly.com/uploads/1/3/5/3/135314407/pixuzaritajexisu.pdfIn PDF document text
    • https://gikesusemu.weebly.com/uploads/1/3/4/7/134775173/c2941.pdfIn PDF document text
    • https://cdn.sqhk.co/saboxiwago/hp7kcjj/lords_online_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/vojazodelud/8G7hiif/nasofadal.pdfIn PDF document text
    • http://tiwikif.22web.org/74018781881.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/gezejoputiwinu/bestiary_4_pathfinder.pdfIn PDF document text
    • http://zenakezogutomu.onlinewebshop.net/gesalezotu.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/gitimuwitabowidi.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/mivujonetufobo.pdfIn PDF document text
    • http://wilukejukiroxu.epizy.com/bts_love_yourself_answer_photos_concept.pdfIn PDF document text
    • https://s3.amazonaws.com/natewared/5557004307.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/onboarding_plan_template_doc.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/anesthesia_and_intensive_care_books_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/free_firefox_win_7_32_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/fuzafuzeruwit/auferstanden_aus_ruinen_piano.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/33300555256.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/amazing_grace_piano_sheet_music_easy_free.pdfIn PDF document text
    • http://tafinefonekon.rf.gd/how_to_use_subnet_mask.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_off00010b02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B02 5668 bytes
SHA-256: 1981103c15925cabf09e5620dad49892bf33337d2e2e795b2c3bc471f32093f2
font_01_sfnt_off00011e17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E17 1800 bytes
SHA-256: fe0844d8054473b268fa82887a9084f284c14e54d833d6ddeb0032e0dcdda13e
font_02_sfnt_off000126ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126EC 11236 bytes
SHA-256: ff2f95b76afd666972ff72c1bf65e0b151d5af74a466c3e67a3d7cce619eed98

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