Malicious PDF — malware analysis report

Static analysis result for SHA-256 b49ec09dc0f888dd…

MALICIOUS

PDF

78.8 KB Created: 2021-03-24 20:58:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 4fcbcdcbcd7e335dd5660e9c999dbed5 SHA-1: 7d9ca9b1cae872be6736aa558812d5c5cbd71597 SHA-256: b49ec09dc0f888ddc34f9306daaa26637015948f1d4f90a2c0c94a6a4aeb0ed9
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used for SEO manipulation or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The embedded URLs, such as 'https://baarspo.ru/award?keyword=classification+of+algae+by+lee+pdf', suggest a lure to a link farm or phishing site.

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/award?keyword=classification+of+algae+by+lee+pdf PDF link annotation
    • https://cdn.sqhk.co/mukujoripu/ehbsier/xivoviritikifiregalapatub.pdfIn PDF document text
    • http://xadazobisisim.scienceontheweb.net/al_barzanji.pdfIn PDF document text
    • http://fafijitesulexiz.mygamesonline.org/what_are_three_good_things_to_say_about_yourself_in_an_interview.pdfIn PDF document text
    • https://cdn.sqhk.co/walekikem/hcggqsF/dunkin_donuts_delivery_near_me.pdfIn PDF document text
    • http://podifodosej.scienceontheweb.net/aviculture_biologique.pdfIn PDF document text
    • http://kefijor.mygamesonline.org/kelorinixedawunofemadizow.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/toliwudalamem/duzepaxojidikinogire.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/35583118144.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/10037329234.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/bigoxapetelapen.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/mariadb_gui_client.pdfIn PDF document text
    • https://80f75f89-a1e3-4611-a0ef-7a704eb82da9.filesusr.com/ugd/0286dd_d9eed91f494c48d8adfa1bb240ce6242.pdf?index=trueIn PDF document text
    • https://4b002d3c-a55f-42ce-816c-238f848e88a9.filesusr.com/ugd/3398cc_ac5a4a9ca5704bc88281248a7815ace4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fujadabez/48556151210.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/jowuvizoragapozotowumil.pdfIn PDF document text
    • http://fuvuvadut.onlinewebshop.net/burger_king_coupons_juli.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/carbonless_paper_forms.pdfIn PDF document text
    • https://2a497570-3881-454f-aefc-229a18bbdf22.filesusr.com/ugd/83e24f_577f7b772b17406fabf3db480e50a3e8.pdf?index=trueIn PDF document text
    • https://4cf2acc4-d143-4013-a78d-f21de0873c4f.filesusr.com/ugd/e4636f_64a621cf66054646bd2c7ba95a5ce647.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/lyrics_adele_-_hello_marshmello_remix.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/i7_7700k_overclock_guide_gigabyte.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_off0000f680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF680 5372 bytes
SHA-256: 3936197be661dfac9c06284b3869cc17a2c153676cbb97e35a6f1da9f23de9ca
font_01_sfnt_off000108df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108DF 10664 bytes
SHA-256: cd818d0f548f001e8bc8f97cd5d87289eab270793b3675c7bfab3dcad7e22340

Open this report in the interactive analyzer, or submit your own file for analysis.