Malicious PDF — malware analysis report

Static analysis result for SHA-256 96b66c67c588cd04…

MALICIOUS

PDF

78.2 KB Created: 2021-03-29 20:50:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9ac05e745766ad0ee342a3b60897adf3 SHA-1: 1f5deb6445f7de531e9f61ba25a6b4e5b8a90850 SHA-256: 96b66c67c588cd04016468b96bdbfab307e2ee4afed2d96f4e1b2ee0139caff5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9996

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 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://xezojetit.ru/123?utm_term=word+puzzle+games+worksheet PDF link annotation
    • http://gewusoluxul.scienceontheweb.net/yunus_cengel_termodinamica_descargar.pdfIn PDF document text
    • http://dimozakebaba.scienceontheweb.net/brussels_travel_map.pdfIn PDF document text
    • http://madawuboso.sportsontheweb.net/63973358108.pdfIn PDF document text
    • https://merusomewazotom.weebly.com/uploads/1/3/4/5/134514041/fubib_nerazog_dididijemavokex_dereropa.pdfIn PDF document text
    • https://texelepetorabaj.weebly.com/uploads/1/3/4/7/134738155/66384ba84b721d1.pdfIn PDF document text
    • http://smartradiobf.ru/marcy_weight_bench_cage_home_gymju5nq.pdfIn PDF document text
    • https://ginalanofogise.weebly.com/uploads/1/3/4/8/134886059/2236593.pdfIn PDF document text
    • https://sidatenut.weebly.com/uploads/1/3/5/3/135349940/2481158.pdfIn PDF document text
    • http://gixodugesu.medianewsonline.com/cuidados_de_enfermeria_pacientes_con_trombosis_venosa_profunda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374022/normal_603f644d236c7.pdfIn PDF document text
    • http://cpskras.website/tiktok_video_downloader_without_watermark_for_iphonefnzxr.pdfIn PDF document text
    • http://lijazojomuzawo.22web.org/bugimawejamo.pdfIn PDF document text
    • https://pegiromilu.weebly.com/uploads/1/3/4/6/134683304/4409097.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470532/normal_6049ef5492508.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuxanewelupeluv.epizy.com/jamiparamavozoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13ad2dd2-55f6-4015-bbf3-486bb339f6fa/club_cart_for_sale_new.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2343d7e-352d-4cf2-abc1-5edc09270f31/gomegurofibimu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/830f6782-22f4-43d5-a765-d22553638a08/ti_84_plus_ce_games_mario_kart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0a3db88-5ace-4f35-8f5f-22cd6b4cbaa7/85737922445.pdfIn PDF document text
    • http://subedawulowuwo.epizy.com/job_tasks_template.pdfIn PDF document text
    • http://bafemiw.epizy.com/used_john_deere_lawn_tractor_attachments_for_sale.pdfIn PDF document text
    • http://xabulupemoze.rf.gd/zatesorejaxoluze.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_off0000f1ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CA 5592 bytes
SHA-256: b36d429853d014d988347c0618dcf40f5cf143db415d66ff422dcc3c6a992e5c
font_01_sfnt_off000104ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104CE 11280 bytes
SHA-256: 092a4ebab1e7b367a781402875a61fe3c8fdb8f3fa44052dc83458672425887e

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