Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5d96ce323acf8ba…

MALICIOUS

PDF

86.1 KB Created: 2021-04-23 04:22:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 57c8b6694ac45c13204384dc6ffebb9a SHA-1: 283cddd864fdae3705c00c311f087fdf9d7383a4 SHA-256: d5d96ce323acf8ba7e78f91a9b9430463a76f308d9c5edede7325e8bff9c0d21
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The embedded content, though obfuscated, appears to be related to a movie title, likely a lure to drive traffic to malicious or spam sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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.
  • 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://jumiwimov.ru/strik?utm_term=thousand+splendid+suns+movie PDF link annotation
    • https://sowupetu.weebly.com/uploads/1/3/0/7/130739285/4ef61dc.pdfIn PDF document text
    • https://wexigovepabenu.weebly.com/uploads/1/3/0/7/130738565/nupufo_tadowakamej_sigur_likexevixekeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468540/normal_605d60371d9dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481282/normal_602ad7a8d7593.pdfIn PDF document text
    • http://negifowutagur.mygamesonline.org/florida_used_car_bill_of_sale.pdfIn PDF document text
    • https://besugadofozoxi.weebly.com/uploads/1/3/5/3/135396803/ab44bbaf9b9e.pdfIn PDF document text
    • https://bozaxemavokasum.weebly.com/uploads/1/3/1/3/131383719/kakibumulug.pdfIn PDF document text
    • https://sofodifimujinem.weebly.com/uploads/1/3/4/2/134234674/ab7f2d.pdfIn PDF document text
    • https://maxuvejalova.weebly.com/uploads/1/3/4/2/134265339/zotuvirukixali.pdfIn PDF document text
    • http://bebetadiruj.mywebcommunity.org/starbucks_mocha_frappuccino_calories_uk.pdfIn PDF document text
    • https://xoludifatak.weebly.com/uploads/1/3/4/4/134477652/9723682.pdfIn PDF document text
    • https://menanotiji.weebly.com/uploads/1/3/4/3/134322389/lamivenepubado_wozivezos.pdfIn PDF document text
    • https://lobekopaxukibo.weebly.com/uploads/1/3/1/4/131453735/1471307.pdfIn PDF document text
    • https://mujonuwamuvix.weebly.com/uploads/1/3/1/3/131383921/vabusedaga_motelazipewa.pdfIn PDF document text
    • http://mikovil.mywebcommunity.org/22004753690.pdfIn PDF document text
    • http://xilatotes.sportsontheweb.net/job_interview_questions.pdfIn PDF document text
    • https://dolopexoje.weebly.com/uploads/1/3/1/8/131872138/7851210.pdfIn PDF document text
    • https://kepudeveru.weebly.com/uploads/1/3/4/6/134698703/bumaxolewarit.pdfIn PDF document text
    • https://miraxinarenipu.weebly.com/uploads/1/3/5/9/135963033/4141405.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/sezewu/dogujojavabadama.pdfIn PDF document text
    • https://s3.amazonaws.com/tumuzu/german_english_bilingual_dictionary.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/cessna_414_ram_vi_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/red_capsicum_nutrition_information.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_off00010f1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1B 5112 bytes
SHA-256: b54500236d51a7629bff790ad6c6f726298fc8c30471884ca2560e794a5b87c2
font_01_sfnt_off00012061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12061 12144 bytes
SHA-256: 9e4faa2be897419eca05a494860513e8618059b80e44cfca5651e4773e146b2d