Malicious PDF — malware analysis report

Static analysis result for SHA-256 083a5801ab8b7a38…

MALICIOUS

PDF

65.7 KB Created: 2021-03-01 02:08:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 44c97c4ee8bd1619fa5c6508836e16e7 SHA-1: 5722de142870a16a0b5d1fcc8b7c863237d371ca SHA-256: 083a5801ab8b7a38f5d4ea3085406c346b059f47d513f98cd32df39712ce7bed
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs that are flagged as malicious redirectors, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. While no scripts were explicitly extracted, the presence of malicious links suggests the document's primary function is to lure users to harmful sites, likely as a spearphishing attachment.

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://crophysi.ru/123?utm_term=dark+sunglasses+lyrics+zz+top In PDF document text
    • http://siwosupegejolop.medianewsonline.com/44716623091.pdfIn PDF document text
    • https://cdn.sqhk.co/jogepirar/Rhbhaig/warhammer_quest_2_review_ps4.pdfIn PDF document text
    • https://cdn.sqhk.co/rarinuva/bhi2Eia/t_mobile_familymode_vpn.pdfIn PDF document text
    • http://fafesixokegigi.getenjoyment.net/58514143597.pdfIn PDF document text
    • https://cdn.sqhk.co/zevolazezag/ojdjie5/wopixesumijib.pdfIn PDF document text
    • http://saxobupazes.sportsontheweb.net/how_old_are_the_riveras.pdfIn PDF document text
    • https://cdn.sqhk.co/sugifila/jisEihH/77820461544.pdfIn PDF document text
    • https://cdn.sqhk.co/jinubodilev/jaijVcr/nail_salon_in_the_mall_prices.pdfIn PDF document text
    • https://cdn.sqhk.co/wedowetaso/jQjiuhg/vitalsource_bookshelf_to_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/teketerep/Wycjfii/48847100964.pdfIn PDF document text
    • https://cdn.sqhk.co/redusebi/heSijGv/fashion_story_game.pdfIn PDF document text
    • https://cdn.sqhk.co/nowavutu/ajjxwQL/baboxeto.pdfIn PDF document text
    • https://cdn.sqhk.co/nowavutu/hjcAien/baby_care_and_dress_up_games_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/bidogefapo/SdJOicV/gaming_soundboard_ringtones_notifications_sound_not_working.pdfIn PDF document text
    • https://cdn.sqhk.co/jefutubup/eRghgcE/who_won_presidential_debate_2020_poll_fox.pdfIn PDF document text
    • https://cdn.sqhk.co/baxajufim/139MidV/28154345804.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/tikoweravisixu/kusezuresafadiduze.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/pigavusinizefiwobibovu.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/funny_quotes_images_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/vekuzorumabuvurawode.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_off0000c723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC723 5316 bytes
SHA-256: f809a06f8944a200542bfd15ab1de9dca00b842eeaf1aa8f147e2cbede4708e1
font_01_sfnt_off0000d96a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD96A 9456 bytes
SHA-256: 959ea57b2275292f4a8be7340f9279185a36c79be4365c74e4393c3c4ef2d605

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