Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dbee93a574ce004…

MALICIOUS

PDF

78.9 KB Created: 2021-03-05 01:13:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ab8cbd46ea15d594c5c22af08b95242f SHA-1: 20f60ab944fa336250a49a42a2ec89f220f3af35 SHA-256: 2dbee93a574ce004a3688204fa61b1e302244670f8755ef30b0fd436d541ca7c
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though obfuscated, suggests a lure related to setting an alarm on a digital watch, which is likely a pretext to direct the user to malicious links. The presence of numerous external URIs and link farm heuristics further supports a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/strik?utm_term=how+to+set+alarm+in+skmei+digital+watch PDF link annotation
    • https://cdn.sqhk.co/gulizate/bvAZLii/runapaludutilirezub.pdfIn PDF document text
    • http://fejukoturig.medianewsonline.com/91356202260.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408184/normal_5fec307dc87e5.pdfIn PDF document text
    • https://cdn.sqhk.co/timugulirebu/jd1ge6D/ice_cream_roll_maker.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393364/normal_603b5f79ad3ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403688/normal_5fe7021ec6e88.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465277/normal_5fe4fa718aeff.pdfIn PDF document text
    • https://cdn.sqhk.co/jotapepikota/hbheggw/wunazarenenemopor.pdfIn PDF document text
    • https://cdn.sqhk.co/vudupapuj/ghifRH2/taduzot.pdfIn PDF document text
    • https://cdn.sqhk.co/masunidupag/CjdgfaT/jinodij.pdfIn PDF document text
    • https://cdn.sqhk.co/dopiporajen/jcVKgdz/bozurika.pdfIn PDF document text
    • https://cdn.sqhk.co/bunewonu/eGAVGjg/neon_wallpaper_for_phone.pdfIn PDF document text
    • http://rolapisi.scienceontheweb.net/31114153531.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483833/normal_5ff288352a6a4.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/lixuduwonifa/zebanewavogajoweretenita.pdfIn PDF document text
    • https://67dec473-0a9c-497c-80b1-62a4c84c5046.filesusr.com/ugd/0aab01_259d3ea3b9f8422b9239bfa970d18dbe.pdf?index=trueIn PDF document text
    • https://3f740848-0e57-4b51-8596-564812021bec.filesusr.com/ugd/cbe17c_ddc90b841e7c4d1f9b558207b93dc7f3.pdf?index=trueIn PDF document text
    • https://8b83d164-5e56-46cc-b941-48f48810ddf3.filesusr.com/ugd/76ce43_7b1d551849e3447bbf5c742540be5956.pdf?index=trueIn PDF document text
    • https://eee7329a-c4d5-4508-a8fd-a8ba515f7d9f.filesusr.com/ugd/5ed802_d1c4ad10245f4d6ab8ee7e4ec3e8e209.pdf?index=trueIn PDF document text
    • http://pedirite.onlinewebshop.net/game_of_thrones_book_one.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/dunufupusuvurepagi.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/jewevakuwuninigotojavib.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/faulkner_county_arrest_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/greeting_card_eid_mubarak_template_free.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_off0000f6c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C6 5468 bytes
SHA-256: 7ea86e7ebdd9424257caea03caa7c2ab0df5e2476a0ca098b9c3c1486ec69c08
font_01_sfnt_off00010944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10944 10704 bytes
SHA-256: 6fb3661991e08135abc9eefa03fd32d2a844700afd5a4227ed188627f47ea406

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