Malicious PDF — malware analysis report

Static analysis result for SHA-256 f88c4e364b201a09…

MALICIOUS

PDF

75.6 KB Created: 2021-03-05 17:35:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5d2f32686c46e51ae43f9841a297eead SHA-1: f5244ae731b8223ccd6e8d60131917795d009f73 SHA-256: f88c4e364b201a0972ba763bfd916315630779264eb6dee9b4524f57ae9e4813
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 0.9991

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://gimoguvi.ru/aws?utm_term=how+to+setup+samsung+printer+xpress+c410w PDF link annotation
    • https://cdn.sqhk.co/wovegorarev/e10YvJb/vixigorej.pdfIn PDF document text
    • https://vulemozebo.weebly.com/uploads/1/3/4/6/134693025/mokibigifate-juruvo-xikagabulu.pdfIn PDF document text
    • https://cdn.sqhk.co/pidodalatip/ifNjhu0/sleep_booster_sleep_better_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/panafilaputu/0ibiggi/retro_game_box_game_console.pdfIn PDF document text
    • https://xikematevi.weebly.com/uploads/1/3/4/3/134392378/4531410.pdfIn PDF document text
    • https://lozofatogil.weebly.com/uploads/1/3/0/7/130739213/2600865.pdfIn PDF document text
    • https://cdn.sqhk.co/zukasedu/8n0Gheu/animated_christmas_movies_on_netflix.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/heX0qid/gun_strike_2_hack_mod_apk_download.pdfIn PDF document text
    • https://vizegibog.weebly.com/uploads/1/3/4/4/134458583/9d45d8cecdf.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/janodojivi/teamviewer_free_for_pc.pdfIn PDF document text
    • http://kadanokadija.epizy.com/lg_top_load_washer_ie_error_code_repair.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/nalelawudomezisil.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/93318064663.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/prentice_hall_gold_algebra_1_cumulative_review_chapters_1-4_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/73396081113.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/9526240285.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/koruvagunizoke.pdfIn PDF document text
    • http://velumosak.epizy.com/abdoulaye_faye.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/tajewexozadinusogor.pdfIn PDF document text
    • http://vosoziwidusetur.rf.gd/how_to_turn_on_a_hoover_carpet_cleaner.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/notification_example_android_studio.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/kefasavamasobawisa.pdfIn PDF document text
    • http://riberudedanute.epizy.com/social_science_class_10_mp_board_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/57984103327.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e98f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE98F 5624 bytes
SHA-256: 023315ac9d131497abfbf5066450aba55109c84c8707cadbf11fb1baa717c7b1
font_01_sfnt_off0000fcc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC8 10396 bytes
SHA-256: d72b9202c6506c911c8adf1d43ad50d111d66caf0a274f5249aae3c06c299d2e

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