Malicious PDF — malware analysis report

Static analysis result for SHA-256 249634740a180222…

MALICIOUS

PDF

78.0 KB Created: 2021-03-09 19:02:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 03d0139587ee345762d79b69fc390d8b SHA-1: 951f999bb3c5233b22fd005530cfa61fca93ad51 SHA-256: 249634740a18022297fea4be2f97ba0f3ac79f4540244b5407c1724da9ed940e
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 0.9991

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://jacksth.ru/123?utm_term=worksheet+generator+4 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4472506/normal_5fd995a396cb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366385/normal_6028e740e2337.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452395/normal_60097b878db45.pdfIn PDF document text
    • http://debakabuxaw.22web.org/xasimowewowigapidigamunam.pdfIn PDF document text
    • http://dodemawaj.iblogger.org/career_paths_business_english_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485580/normal_602c4f03ac551.pdfIn PDF document text
    • http://besuxiju.22web.org/recyclerview_adapter_android_cardview.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468551/normal_60432462735b8.pdfIn PDF document text
    • http://jogubewuzamofet.iblogger.org/92906639391.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445534/normal_5fd05830b01a2.pdfIn PDF document text
    • http://ravuwetob.iblogger.org/96065443108.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475562/normal_5fcb1bea5403a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387709/normal_5fd8906f7e9a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471686/normal_6002638c2b9c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445104/normal_600fa1c2c0bdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408461/normal_603568f725a99.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412154/normal_6006ef124dad2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384142/normal_60478226572b2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://joriboka.epizy.com/convert_alcatel_idol_4s_windows_to_android.pdfIn PDF document text
    • http://zunuwovadete.epizy.com/tolirusutokoke.pdfIn PDF document text
    • http://vopogelos.epizy.com/advertisers_gothic_font_free.pdfIn PDF document text
    • http://sekekubonigav.rf.gd/alarm_tone_zedge.pdfIn PDF document text
    • http://goxakimolo.epizy.com/pabudutajofanelunafejoj.pdfIn PDF document text
    • http://tasijojaludet.rf.gd/application_form_word_format.pdfIn PDF document text
    • http://fuvafajof.rf.gd/wukagunute.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B2 5080 bytes
SHA-256: 8f95c908949f833fb905adba2e9fac6789c26d18d46f9fd1e941b0c841e98e87
font_01_sfnt_off00010708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10708 10368 bytes
SHA-256: 96a9d4bc3457c7c841436c53910e2798335320e3fa761d953ed8be7e2eeac665

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