Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae7d4ec4482b839c…

MALICIOUS

PDF

76.2 KB Created: 2021-03-25 06:52:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: f461f9b6c8a3925f358c7397f2014610 SHA-1: b939540f69bfe2d7e7afdced508929945f9adee2 SHA-256: ae7d4ec4482b839c82fa2247baba22eca996e8eca403c1ccd06ed367bb980f4e
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by multiple heuristics as malicious, including a phishing and link farm detection. The document body, though heavily obfuscated, suggests a lure related to 'Othello' to direct users to the malicious domain seumenha.ru. The presence of external URIs and link farm characteristics indicates a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=no+fear+shakespeare+othello+act+1+scene+3+summary PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453741/normal_5fd376dbd9e4b.pdfIn PDF document text
    • http://jushq.pro/basudezedasegody4mly.pdfIn PDF document text
    • https://cdn.sqhk.co/wadupaxi/higejhZ/dragon_village_cheat_mod_apk_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/modonasuje/fAXRfjg/xikojejub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417023/normal_5ff7cb243dd82.pdfIn PDF document text
    • http://stankoff.org/how_to_max_out_all_social_links_in_persona_4_goldendmqyz.pdfIn PDF document text
    • https://cdn.sqhk.co/vusanutoj/hjMxvja/marvel_future_fight_iron_heart.pdfIn PDF document text
    • https://cdn.sqhk.co/bepeguvovori/getjc81/jafawogegup.pdfIn PDF document text
    • http://thedouche.xyz/la_cimbali_m29_selectron_service_manual3gsch.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://31c8a3d4-0132-49f1-a04f-09c79d03e01f.filesusr.com/ugd/a4da84_76441732f4cb41859fa6599bc4227fd8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c597a7e-a848-43ae-8c9a-bd0bd6c3f255/24087372936.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdc027ef-781e-47a3-8e43-0b1d66f9195c/orbit_model_57894_wiring.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/rumipatima.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/150273bb-3876-4518-8feb-05786051ecc1/who_uses_management_accounting_information.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/becoming_vegetarian_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/vovimituvadem.pdfIn PDF document text
    • https://3c1efe6f-6e34-41bb-a2c4-2be85dd3cb33.filesusr.com/ugd/41f880_6ee07226977a4a4ea07efec8ae92d0b5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nafamaragisek/15756909737.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/robuzijumujimaxarako.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_off0000ec51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC51 5604 bytes
SHA-256: 3e93bb9077466cae0373afef4719fcbef3356d06e88e7980bf1a36fcdcf84747
font_01_sfnt_off0000ff53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF53 10608 bytes
SHA-256: 711032679c440ccfc34dc020dbf076f3d16c1569247b5fc33ce17f7077e7c75f

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