Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d571b9c8958512b…

MALICIOUS

PDF

69.0 KB Created: 2021-04-08 08:29:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 8b5b04360b0f019cf1ba93cab02e67e0 SHA-1: b2d6466a81df352f2e495c13bdb755d70c14365f SHA-256: 8d571b9c8958512bda4f86610381290b56853948d70a75bea670175e67ffe6eb
196 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • 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://kuzutuzo.ru/wix?keyword=azur+lane+core+data+reddit PDF link annotation
    • http://pixunune.sportsontheweb.net/business_plan_contents.pdfIn PDF document text
    • https://dobuwejakunarek.weebly.com/uploads/1/3/4/7/134772316/dufalofe.pdfIn PDF document text
    • http://didazema.mypressonline.com/asvab_practice_test_arithmetic_reasoning.pdfIn PDF document text
    • https://divozurov.weebly.com/uploads/1/3/1/4/131437474/564ea784f9f0.pdfIn PDF document text
    • http://basagutidabe.sportsontheweb.net/download_batman_the_killing_joke.pdfIn PDF document text
    • https://dimawirosaj.weebly.com/uploads/1/3/3/9/133997296/b8f38acc9be03.pdfIn PDF document text
    • http://bimonetejatoleb.mygamesonline.org/calidad_ambiental.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/penale/migetij.pdfIn PDF document text
    • http://kipejefanowisu.atwebpages.com/34888414606.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/fraction_subtraction_worksheets_5th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/napan.pdfIn PDF document text
    • https://54957a25-093b-4cbd-a4f0-8eb5fea931f0.filesusr.com/ugd/8ba634_cb98fae75c914379806e60c8125bb16c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/how_many_quarts_does_a_chevy_350_take.pdfIn PDF document text
    • https://c183b790-cb34-49aa-848e-1a9f2b14dda3.filesusr.com/ugd/d8966e_4ac6ae8f2a1c4636a54eddfb6019962d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fodose/how_to_reset_sagemcom_router_password.pdfIn PDF document text
    • https://1b53f64c-3596-40ff-86ea-95cec8902569.filesusr.com/ugd/838e7e_aa0740354a0a4e97a6320928d371f6f5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mogedozara/44375331387.pdfIn PDF document text
    • http://panexorumilogim.myartsonline.com/tl-wr841n_firmware_upgrade.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/jozopit.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/bacterial_transformation_process_slideshare.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC033 4912 bytes
SHA-256: 96a4869bf7c1a6f854d4314470fae59355617c5d0c1c97d4fa0ebac686391170
font_01_sfnt_off0000d120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD120 4796 bytes
SHA-256: 9d638ebee096737ad9a36e2a99c2a9120f102bbea7a6dd21d8e81ddc60f8f6e8
font_02_sfnt_off0000e182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE182 10412 bytes
SHA-256: a6cd97b015243f4b6618d6643cb785b7e3cdd7a5df8af7a07ae884da40e47e44

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