Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e7cbb23a734157c…

MALICIOUS

PDF

80.1 KB Created: 2021-03-24 08:02:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 4eacdd0d8ec8a590fa978e857696dd60 SHA-1: eae5315b1307ef3d613c11ec684c81814505b6cc SHA-256: 9e7cbb23a734157cdfc459e2562bf12303a26b3db28a4520378886dc528a8069
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, appears to be a deceptive lure related to '8 ball pool rules'. The presence of external URIs and the overall structure strongly indicate an attempt to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://vilenefex.ru/award?keyword=8+ball+pool+rules+simple+pdf PDF link annotation
    • http://xupevagadozojad.22web.org/nuwufunawu.pdfIn PDF document text
    • http://felidefewipikig.22web.org/jezorutodinogulu.pdfIn PDF document text
    • https://cdn.sqhk.co/donewipimep/lTGjfif/master_craftsman_blueprint.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/9hjgfcM/pocket_knife_walmart_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/ULDGAUJ/vajeguremepusapefotoget.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485714/normal_602b9093c7c65.pdfIn PDF document text
    • https://cdn.sqhk.co/nutakurij/pcibFih/rolling_sky_2_all_levels.pdfIn PDF document text
    • https://cdn.sqhk.co/dubibuwa/hgibja9/72479182065.pdfIn PDF document text
    • https://cdn.sqhk.co/jipuxoxukul/ifhf4hi/caravan_stories_beginners_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/wadelovelo/bhhqjio/disney_package_price.pdfIn PDF document text
    • https://cdn.sqhk.co/segenoliz/ijviiP1/send_money_to_mobile_wallet_western_union.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480585/normal_603417fe82513.pdfIn PDF document text
    • https://cdn.sqhk.co/kuxixixixi/hjgjgij/63747485904.pdfIn PDF document text
    • https://cdn.sqhk.co/dujepiwewi/3YihImZ/wedding_anniversary_cake_decorating_ideas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453098/normal_601e509d6d514.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/69cdfbe2-2ee8-471b-8519-2366fe8442f4/wuroxezipetefewen.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/kuwalopewelijuparopano.pdfIn PDF document text
    • http://newigumumakewi.epizy.com/download_diba_barzanji.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/37579033630.pdfIn PDF document text
    • http://kezepinaxozegom.epizy.com/terapi_anis_merah_macet_bunyi.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/ruvovusutarigiwiginusu.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/79478736670.pdfIn PDF document text
    • https://s3.amazonaws.com/gagotaniwipure/69594922075.pdfIn PDF document text
    • http://jufonerazulo.rf.gd/35459645137.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf38ae6d-5055-4947-b46b-cdca2930b69f/mitologia_griega_dioses_inframundo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB9 5124 bytes
SHA-256: 5f0682a4b4fc2f79794337fe203ad0d14c42095e849e0fbeba47cf8bc570839f
font_01_sfnt_off0001010a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1010A 10476 bytes
SHA-256: e41e087d48c620690be94c7337e19074fd5a319afdc0067016e981d4e1260085
font_02_sfnt_off000124ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124EA 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34