Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0480dfd4a1f3826…

MALICIOUS

PDF

74.7 KB Created: 2021-02-22 13:40:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b17811d16a11268369faf7a0de1b891b SHA-1: 94719a13e58d0b7b5fd41124ee7f6978dc9102c3 SHA-256: a0480dfd4a1f38268563479ea6c55e840fee0a07d3d98b9d7e1a729b9bc97114
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 0.9996

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
  • 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://baarspo.ru/wix?keyword=big+head+soccer+friv PDF link annotation
    • https://cdn.sqhk.co/bozadukopufu/qgcjeL1/60109124562.pdfIn PDF document text
    • https://cdn.sqhk.co/zexetiminav/gQigTpG/penguins_animal_crossing_pocket_camp_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tamaladafa/e8iaic4/xaweririju.pdfIn PDF document text
    • https://cdn.sqhk.co/rolileduvof/ajjLghN/68517404282.pdfIn PDF document text
    • https://xelegiri.weebly.com/uploads/1/3/4/4/134435730/2dc069bed68.pdfIn PDF document text
    • https://cdn.sqhk.co/zufuxirap/eiiUiaK/flashlight_lyrics_karaoke_pitch_perfect_2.pdfIn PDF document text
    • https://cdn.sqhk.co/foseziwate/ij58jjU/69790184406.pdfIn PDF document text
    • https://xanikijopido.weebly.com/uploads/1/3/4/7/134738407/d7f14c1.pdfIn PDF document text
    • https://cdn.sqhk.co/lojosewude/tnYjbty/buttercream_icing_recipe_for_cake_decorating_with_shortening.pdfIn PDF document text
    • https://cdn.sqhk.co/kixarozikej/gfpiihg/kewipof.pdfIn PDF document text
    • https://cdn.sqhk.co/bomikiwolug/dwVidgc/versatile_mage_wiki_salan.pdfIn PDF document text
    • https://cdn.sqhk.co/moxulofilose/hd0CgEJ/gobuxepif.pdfIn PDF document text
    • https://cdn.sqhk.co/pazaxefuma/2jijbmT/dub_dash_cam_reviews_consumer_reports.pdfIn PDF document text
    • https://cdn.sqhk.co/sezelijimofi/gcjf1Zn/5834389868.pdfIn PDF document text
    • https://cdn.sqhk.co/poronujefino/hjjaiix/ballinger_memorial_hospital_clinic.pdfIn PDF document text
    • https://cdn.sqhk.co/rowojazur/0Ueluk2/71560299617.pdfIn PDF document text
    • https://cdn.sqhk.co/lazuxorus/jghjQD1/poblano_peppers_recipe.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/fuwawibu/can_you_solve_this_puzzle_30_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/anticoagulante_lupico.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/32619922000.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/real_talk_between_the_sheets_podcast.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD130 5360 bytes
SHA-256: f1729930001b324b3cb9dfae53c35fc250209332ace32c7161fccf4545143669
font_01_sfnt_off0000e377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE377 10460 bytes
SHA-256: 1a9d09db4de05ceb9c382ac3857e5b3fb3c552dd1f1e853d2e0409f3c3c6f0d4
font_02_sfnt_off0001076f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1076F 16380 bytes
SHA-256: 970252b3315b5fa24618e4e4486089cd80d2ae6ee80e3ad54fc29c596df9b3dd

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