Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1764f41f6c5d5a8…

MALICIOUS

PDF

78.9 KB Created: 2021-04-17 09:14:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 9d6983533bd28afe14bdc1b1ce3ff366 SHA-1: 3bdcba502d7da008c6381059026af91f51398936 SHA-256: d1764f41f6c5d5a8af49532c82724392f32c83e4ee67868ba9db05f6cbfa032e
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It contains a significant number of embedded links, with several pointing to known malicious redirectors and disposable hosting. The primary purpose appears to be directing users to malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://crophysi.ru/strik?utm_term=can+you+replace+simple+syrup+with+honey In PDF document text
    • https://cdn-cms.f-static.net/uploads/4486354/normal_6038f8bb0d2fc.pdfIn PDF document text
    • http://xbet1.fun/tivuwasinenuvimimcuv2z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_60105871c51e5.pdfIn PDF document text
    • http://wiinorama.fun/ocarina_of_time_3ds_romov40i.pdfIn PDF document text
    • http://kelnoteres.xyz/vesulibiwojozofabnt3t.pdfIn PDF document text
    • http://mybestchan.online/vowesa5varv.pdfIn PDF document text
    • http://olymp-trade.top/fitawoborazuf0rj0c.pdfIn PDF document text
    • https://dutofubexel.weebly.com/uploads/1/3/4/6/134631161/52c6736d8f1.pdfIn PDF document text
    • https://tiwudusakuwizir.weebly.com/uploads/1/3/1/6/131637104/tumuxofi.pdfIn PDF document text
    • https://dotanivim.weebly.com/uploads/1/3/4/7/134705276/pebufunuxinelobufal.pdfIn PDF document text
    • https://bukodagunotul.weebly.com/uploads/1/3/4/0/134012399/fibiki-xifokosex-joxuvinuxe.pdfIn PDF document text
    • https://nasijominazol.weebly.com/uploads/1/3/4/3/134366940/64c3a3b78f3e408.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/c029f661-d619-4ed9-bb38-8fa5d210da67/63550418320.pdfIn PDF document text
    • http://nedofej.epizy.com/77632051987.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19cfde86-2f30-4585-9225-a27df5651d28/44414833387.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db0c72b9-1163-4177-8209-0997ce6b13b6/whats_the_healthiest_thing_at_taco_bell.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c420ef2e-c170-42a7-a382-d40f03e3ee6b/public_speaking_tips_and_tricks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db4359e3-a9a7-4961-b52b-d812e8fcb207/how_to_install_bible_app_on_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9ee7e6a-6b80-4872-b0f5-1c83e7c9fd00/24334290486.pdfIn PDF document text
    • http://nujemapamonaj.epizy.com/66195213711.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8847bd21-6e76-4e26-b0dd-da3f56880e47/fejukozego.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6827ac43-f653-4c5c-b88b-ffd0769c06a6/concepto_de_interes_simple_y_compuesto_en_matematica_financiera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d10aacf9-67f9-4656-b890-55067c5f2aec/microsoft_dynamics_ax_enterprise_portal_the_request_timed_out.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bc63a19-8c8b-4335-9557-d956b7734d6f/17362891457.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC22 5272 bytes
SHA-256: 1518e33ba08680f7007c593aa6d11f56bbae57a8db5a3e7cda940cfdc5f537a4
font_01_sfnt_off0000fded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDED 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0001067b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1067B 10964 bytes
SHA-256: 6c58369f864c57b7e3bf34ca43f5b2e134c315ca94a1ddb1521b152904c68ace