Malicious PDF — malware analysis report

Static analysis result for SHA-256 99abde40533be278…

MALICIOUS

PDF

80.9 KB Created: 2021-04-02 22:03:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: f59139e16b346b8025b14239714670e9 SHA-1: f289c691210461dfa554b9950736f1ebe2043565 SHA-256: 99abde40533be278d72a3e6840ce715703a48dd331ae8c50a2e97e5c97364228
226 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm for SEO manipulation or malware distribution. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification further supports malicious intent. The document body, though heavily obfuscated, contains text related to downloading movies, which is a common lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://midufefew.ru/strik?utm_term=descargar+los+juegos+del+hambre+sinsajo+parte+2+castellano+hd PDF link annotation
    • http://opensoda.pro/who_is_queen_elizabeth_in_season_3_of_the_crownto0of.pdfIn PDF document text
    • http://powerpoint4you.ru/ehsaas_nahi_tujhko_status_videokvbst.pdfIn PDF document text
    • http://weareanonymous.org/dragon_nest_warrior_class_guide4jia8.pdfIn PDF document text
    • http://hallhq.xyz/bill_of_lading_short_form43men.pdfIn PDF document text
    • http://prizinsta24.space/76454883444i13bh.pdfIn PDF document text
    • http://hamsterbig.com/dasolowuxugogirubetegapur4ouk.pdfIn PDF document text
    • http://cosmostil.top/114377379236rfz8.pdfIn PDF document text
    • http://labincom-med.ru/865850585960iwsc.pdfIn PDF document text
    • http://womenita.fun/pentagonal_prism_faces_edges_vertices62xo7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/98629d47-2e01-48a1-8861-ef375c8c566e/86524419660.pdfIn PDF document text
    • https://121f8fc1-d270-4171-a721-8ccd656fc20f.filesusr.com/ugd/2ca22b_367897d09f2347fabbf1985f086270cd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zukogi/torolexiwapumanunekofubu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b762e56e-1e56-4b08-8e64-a94cc7ce1707/three_body_problem_book.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/how_historically_accurate_is_the_bible.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8afdd3b3-8d24-48d7-b0be-5b7b8d236fa8/pujemepidebebojalo.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/naruzutepobixa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a04f9286-67da-4859-9a2d-f0ecb18018f9/wikonulezi.pdfIn PDF document text
    • https://c6f55193-7475-4343-97dd-33cb3b141b6a.filesusr.com/ugd/808d8c_3a76a07727ef4a0ea4194333a302cade.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/mosokirofejelamovereva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03360ad8-ccf5-44e7-b345-99df69d91a8a/gixuz.pdfIn PDF document text
    • https://51da6a7d-ee05-4a49-87ee-1b74af3aeb07.filesusr.com/ugd/b80405_63f09d2f18dd448ebc252bc589b6c111.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eb8ab3d-f1c6-4cb9-b8e5-5c9dcab9e8b0/how_much_do_police_detectives_get_paid_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/928f389d-9ee6-435a-93a6-4a7d53727124/54129422530.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_off0000f85b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85B 5832 bytes
SHA-256: 7d292a7edc065f3d4c81e878302bd13a900356df3c32732d09fea2ba8064c954
font_01_sfnt_off00010c0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0F 12120 bytes
SHA-256: 63ed01daf311efd84e4c5f3b1a6a6a882f94e951e350c1fcbb3fe176963f7439

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