Malicious PDF — malware analysis report

Static analysis result for SHA-256 a019ce20f9ea77d7…

MALICIOUS

PDF

104.3 KB Created: 2021-03-17 07:46:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e0542fa3f6c23c2537e58e3b6bf11448 SHA-1: b1fbc90ca74bc200b1fe698dd0a1452da8c6a838 SHA-256: a019ce20f9ea77d722047e9980badc6da9aa3c6bc66ebc4cbd3451f71307e1c0
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses brand-impersonation credential phishing. 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 0.9988

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
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://gegixigozazewit.weebly.com/uploads/1/3/4/8/134858275/7521210.pdf.
  • 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://ponafet.ru/wix?keyword=belkin+manual+f1+po243+gau PDF link annotation
    • https://cdn.sqhk.co/vixuzemabad/fjehcjf/blogs_de_libros_descargar.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxodokoju/ijijhjf/pocket_door_handles_with_lock.pdfIn PDF document text
    • http://rajelakitapeki.iblogger.org/lcm_and_gcf_worksheet_grade_7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375698/normal_60033afc64702.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416512/normal_5fd7d470e6ffd.pdfIn PDF document text
    • https://gegixigozazewit.weebly.com/uploads/1/3/4/8/134858275/7521210.pdfIn PDF document text
    • https://jasujoru.weebly.com/uploads/1/3/1/4/131483343/5067280.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470685/normal_5ff24d3e2e461.pdfIn PDF document text
    • https://gujuxufun.weebly.com/uploads/1/3/5/3/135398829/1483172.pdfIn PDF document text
    • https://cdn.sqhk.co/mibemofega/GicDcTf/26170979037.pdfIn PDF document text
    • https://nidikibadut.weebly.com/uploads/1/3/1/4/131453007/denetedelimolibuxu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413126/normal_5fc5aef5a73da.pdfIn PDF document text
    • https://penoruzeni.weebly.com/uploads/1/3/4/1/134132400/fupevoduxalot.pdfIn PDF document text
    • https://cdn.sqhk.co/natokaze/aQhbiso/35163581581.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
    • http://bogadigoxizalux.epizy.com/arun_kumar_singh_educational_psychology_books_in_hindi.pdfIn PDF document text
    • http://jipokogave.epizy.com/car_wash_business_plan_presentation.pdfIn PDF document text
    • https://3e1d1bad-f645-4ebd-ac75-469e7ff7c972.filesusr.com/ugd/e745be_abca1c2c0c1d4d479fa52d0ebbdcbef7.pdf?index=trueIn PDF document text
    • http://nogevas.epizy.com/days_of_the_week_worksheet_for_grade_1.pdfIn PDF document text
    • http://sivutesafukim.rf.gd/tofobatov.pdfIn PDF document text
    • https://989eff4c-946f-4221-9817-1a8d60f2082d.filesusr.com/ugd/7edf14_f792036afcf448bfb08c1f1ca51ab208.pdf?index=trueIn PDF document text
    • http://welilejaw.epizy.com/britax_boulevard_weight_limit_rear_facing.pdfIn PDF document text
    • http://xafonabikox.rf.gd/36905593200.pdfIn PDF document text
    • https://24a70dd4-b549-4b9e-9c0a-6eea45ab85ad.filesusr.com/ugd/ab0c63_4f364b060c2c454385b5e39b5e629946.pdf?index=trueIn PDF document text
    • http://mumidukegex.rf.gd/kilalimagegirakinugut.pdfIn PDF document text
    • https://f733e552-90a1-4d1f-83ca-a6b36afcf31c.filesusr.com/ugd/38bf1f_e08fde9b6ef74816b642d3d2c354f116.pdf?index=trueIn 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_off00014be7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BE7 5296 bytes
SHA-256: bf8c5100edd85f7eacae0e42c48584042cbcc572cdd80e03ade6e292e3c09b67
font_01_sfnt_off00015dec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DEC 11160 bytes
SHA-256: b0e7c2a8416f513034d4f6ff238d85eed5e9fb68e497570658062ca253b8bcfa
font_02_sfnt_off000183d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x183D6 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3