Malicious PDF — malware analysis report

Static analysis result for SHA-256 faf64c05bd2f2ad9…

MALICIOUS

PDF

74.4 KB Created: 2021-02-13 21:04:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 55bf4440d79bd842f0d6230da9770dd1 SHA-1: 9c8aaa03b11594267776e553a56ae29d95752219 SHA-256: faf64c05bd2f2ad9cc323181531d63dca5f368e6e713536e01aead807864c126
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The file is a PDF containing numerous external links, many pointing to disposable hosting and exhibiting characteristics of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were directly extracted, the PDF structure and numerous URLs suggest it's designed to redirect users to malicious sites, potentially exploiting vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://baarspo.ru/aws?utm_term=egypt+pestel+analysis+market+research+report PDF link annotation
    • http://dkblogin-de.com/download_unfriended_movieyi67a.pdfIn PDF document text
    • https://nosuzodudoj.weebly.com/uploads/1/3/4/5/134588086/de8bc60a89a9.pdfIn PDF document text
    • http://redtea.space/409387674195wwr7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384628/normal_600685ff881ce.pdfIn PDF document text
    • http://youralteragoods.com/dragon_ball_z_complete_series_free_downloadrnynx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426676/normal_6005c1aaebe13.pdfIn PDF document text
    • https://cdn.sqhk.co/tubadaluzafu/gccfigO/dino_t-_rex_hack_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/pibilebomek/jehehb6/56684197696.pdfIn PDF document text
    • https://cdn.sqhk.co/liregevo/idififV/75071935944.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505820/normal_5feb80a2a55c5.pdfIn PDF document text
    • http://summ-ita.space/7_days_to_die_commandd0ngy.pdfIn PDF document text
    • https://cdn.sqhk.co/fifapupifig/cw66ehh/fumawarufuligodemun.pdfIn PDF document text
    • http://policyhelpcenter.com/bedoyecta_para_que_sirve_precio1xdb6.pdfIn PDF document text
    • http://fastcreditcheck.info/42217520514uvr0p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417216/normal_6017159bbf5fc.pdfIn PDF document text
    • https://fikosaxan.weebly.com/uploads/1/3/4/7/134753192/55932d.pdfIn PDF document text
    • https://kikosezuzo.weebly.com/uploads/1/3/1/3/131378972/pejuwixeve-woderojekuxuzal-lamituzebewu-lopuwoxevudu.pdfIn PDF document text
    • http://fortuneo.biz/subject_verb_agreement_rules_free_downloadpnjae.pdfIn PDF document text
    • https://menuzuxa.weebly.com/uploads/1/3/1/0/131070619/3561630.pdfIn PDF document text
    • http://my-favshopd.online/297930537273s9rj.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/lupebesu/bowmanville_hourly_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/52124795436.pdfIn PDF document text
    • https://s3.amazonaws.com/tumuzu/beethoven_bagatelle_in_a_minor_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/72699759063.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_off0000e332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE332 5468 bytes
SHA-256: 99830170717d3b283c84ce52e2af725cce49995c7e03b9853c6a6b7ee3d97777
font_01_sfnt_off0000f5b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B7 11192 bytes
SHA-256: 2a37c826bc0f260893ae92b66e6a0b513075afc155c4aee00d768e4b5f04b2fb

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