Malicious PDF — malware analysis report

Static analysis result for SHA-256 59b3be0c986511c5…

MALICIOUS

PDF

78.4 KB Created: 2021-03-22 22:16:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db5463049cda178fbc6232412d969635 SHA-1: 1f5e93f8fd42d77ca3f779984113469ff12eae11 SHA-256: 59b3be0c986511c5f91e3542ac9069f8c4d2efbeb09676756302bc63e2ed6b4a
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly and other free hosting services, indicative of a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/strik?utm_term=the+odyssey+book+9+short+summary
    • https://tadonajates.weebly.com/uploads/1/3/4/3/134319020/juromelo_loximo_begonepiku.pdf
    • http://kemytbok.xyz/fesipxroxs.pdf
    • http://www19216801.site/how_to_prepare_a_goal_sheetndc8l.pdf
    • https://rasizuxuner.weebly.com/uploads/1/3/1/3/131378923/maninavenakizasakad.pdf
    • https://wukajimodowel.weebly.com/uploads/1/3/0/8/130874313/1105132.pdf
    • http://goossyy.online/how_will_you_describe_rainbow_to_a_blind_personvo0db.pdf
    • http://akmurzina.com/order_email_template_magento_29zr4v.pdf
    • https://vodefuba.weebly.com/uploads/1/3/4/6/134688083/tuneponozelipuj.pdf
    • https://bugajujifupub.weebly.com/uploads/1/3/4/8/134894919/jibovezilopofe.pdf
    • https://natemavobu.weebly.com/uploads/1/3/4/3/134349428/d03c5d380a21a89.pdf
    • https://xasukibumit.weebly.com/uploads/1/3/4/7/134749231/c5876b6d51dfb.pdf
    • https://biruvosuvibu.weebly.com/uploads/1/3/0/7/130739381/melotowipus.pdf
    • https://kafiwixuvaso.weebly.com/uploads/1/3/0/8/130874495/1863092.pdf
    • http://idealicaitalia-official.site/jofamowugomokelezoximupu0otqo.pdf
    • https://zowamuzifam.weebly.com/uploads/1/3/1/1/131163536/9168528.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0cb840ff-a474-4358-93e8-3bd70f1f2c10/tawepibil.pdf
    • https://uploads.strikinglycdn.com/files/c28319ab-b6a6-4a59-8716-e649806e99ae/suzawubilizorezigar.pdf
    • https://uploads.strikinglycdn.com/files/2a760e19-6580-416c-87b0-f79d6238a33e/google_docs_flowchart_template_free.pdf
    • https://uploads.strikinglycdn.com/files/9c41aa23-6294-405f-9737-3dd4910678c2/make_your_own_business_cards_print_at_home.pdf
    • https://uploads.strikinglycdn.com/files/d131ca62-c7e6-44db-ab97-6c086636a78a/yamaha_01v96_digital_mixer_price.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f51b.bin
5347709bcc1c0b9d548f3574fc07b7686b026c1670241a704dd8e272b7f7bb8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF51B 5444 bytes
font_01_sfnt_off0001076f.bin
e66f94dd033b7b16783794311ec71a59c3b3e749baa51470cb3bd1b5a6437a7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1076F 10916 bytes

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