Malicious PDF — malware analysis report

Static analysis result for SHA-256 626ecc5c541b8239…

MALICIOUS

PDF

76.8 KB Created: 2021-03-23 01:48:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3f9d6a6d052472e29273b11a7c948693 SHA-1: 83e6275fb0311298751503ed5cee22a84fc82ef8 SHA-256: 626ecc5c541b82396024840215d5b71e3a798a1d5bcc199f06769ce585df7199
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 0.9997

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://ponafet.ru/strik?utm_term=motor+vehicle+mechanic%2527s+textbook+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4469126/normal_605914f33b20b.pdfIn PDF document text
    • http://vukosam.22web.org/bosipali.pdfIn PDF document text
    • http://xojudesabesone.66ghz.com/zobedazotumosapupavumisuf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496148/normal_5fdf88c925bfd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492575/normal_6029ee1eef447.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422133/normal_5fcdfecea987d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470399/normal_5fce472d41f34.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7459d44e-b167-4376-b2db-d09819599fdb/diluzufumupuwumuvaza.pdfIn PDF document text
    • http://kamabutexukawiv.rf.gd/61394953394.pdfIn PDF document text
    • http://surofavuvaxono.epizy.com/adobe_creative_cloud_apps_won_t.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/bonafide_application_format_in_marathi.pdfIn PDF document text
    • http://zelimasiropaf.epizy.com/mathematical_expectation_questions_and_answers.pdfIn PDF document text
    • http://zevabexidedu.rf.gd/neumonia_que_es.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f1c4a0f-35ca-4fec-bbc2-a0524041ae34/1965_chevy_c10_headlight_switch_wiring_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1600ab03-9466-44a9-8c52-649353960329/wonder_comprehension_questions_part_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38b9d510-bd5a-4f2e-ada2-f3a80240f73b/toro_power_clear_721_r-c_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bff4d840-ca2b-479d-95d6-5147132ef9ca/my_friend_dahmer_full_movie_online_for_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41164fc6-6105-4af9-b960-82573ef296c8/takiwuxajujigavovi.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/pazumo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/130a52d7-3f40-4ea3-a282-2212ac6d0655/east_of_eden_movie_cast.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_off0000ea91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA91 5764 bytes
SHA-256: 5bdc25269d3bf2747fa3582e2f22d3b6ee1a9883108111a439c14a6c9065b961
font_01_sfnt_off0000fe18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE18 11220 bytes
SHA-256: 739c016924c6504cef9b4b5de9c52877937b9ad21457da80036836e7c0aa194f

Open this report in the interactive analyzer, or submit your own file for analysis.