Malicious PDF — malware analysis report

Static analysis result for SHA-256 f59ebc01d55af281…

MALICIOUS

PDF

75.1 KB Created: 2021-03-09 01:40:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 94bf356f1147eff339a4655186b5445e SHA-1: a71ca9deec67ba2849368b09eadbae42db21aaab SHA-256: f59ebc01d55af2819a7db7fe9f2c931ae424e018d0e4952639224420c742aec2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1105 Ingress Tool Transfer

The PDF contains numerous external links, with a critical heuristic identifying a link farm pointing to 30 external PDFs, including one at 'https://s3.amazonaws.com/safenalavojuwu/pejof.pdf'. The primary external URI 'https://kuzutuzo.ru/wix?keyword=kenshi+recruit+prisoners+guide+paladin' is likely a lure to a phishing or malware distribution site. ClamAV detected this as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', indicating a phishing or trojanized PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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=kenshi+recruit+prisoners+guide+paladin PDF link annotation
    • https://cdn.sqhk.co/muresogus/HbihgeF/fake_gps_location_apk_link.pdfIn PDF document text
    • https://cdn.sqhk.co/pajokiman/g0hiiii/poptopia_2019_price.pdfIn PDF document text
    • https://cdn.sqhk.co/gonolesuzam/rLYhehe/glock_guns_online_shooter_3d_print.pdfIn PDF document text
    • https://cdn.sqhk.co/foroboreb/y7bjjgL/45325194732.pdfIn PDF document text
    • https://cdn.sqhk.co/varomapit/bzhjjhF/my_boost_mobile_customer_service.pdfIn PDF document text
    • https://cdn.sqhk.co/gebunemif/syghXjf/sofedamujufagunipijo.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/safenalavojuwu/pejof.pdfIn PDF document text
    • https://684917c6-b594-4497-9ea4-141105166a5b.filesusr.com/ugd/0dc9f5_9cb6b1926931446c8170ccb6fd6048a7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sivanira/aggregate_data_reporting_address.pdfIn PDF document text
    • https://05f6fcc2-a4c7-4d5b-b58c-97b640a93f4d.filesusr.com/ugd/74147a_c2a95fabc431489caee9484a76ffa000.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/zidoxinezat.pdfIn PDF document text
    • https://3a00e800-a8eb-44ae-aafc-ae9aecab8e06.filesusr.com/ugd/1715bf_0f70d4a0b87e4dd1a4f1a8559345e1f4.pdf?index=trueIn PDF document text
    • https://f9a132f0-acc9-4761-b7d8-38025aedd849.filesusr.com/ugd/5c71d6_bfdc16cfc1f449d1874da15fa54dbf92.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/general_aptitude_questions_for_gate_exam.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/konutakazuworilewibokina.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/examples_of_chemical_energy_transformation.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/gefivikejalugesaroduvug.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/retail_and_wholesale_trade_industry_fact_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/calling_recording_app.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/25636173808.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/dubai_police_accident_report_by_chassis_number.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_off0000e88b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88B 5304 bytes
SHA-256: e2d947c73193e2ed4b970fa4a8294463dda3ebf781afeca6fe1e11bc49d1b391
font_01_sfnt_off0000fa95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA95 10732 bytes
SHA-256: b3158fb7e74c79aae0e0fcde0eb1d0ac746b29315bde55d68c2722bd927977c6

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