Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e16d30dc35b43c0…

MALICIOUS

PDF

110.7 KB Created: 2021-04-28 21:24:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 34b05d72b0ad8c0bf32ba11e9b6e266e SHA-1: 5151738bd7d66535f407c6e7a5385d2b081b68de SHA-256: 4e16d30dc35b43c0f368bf03b3439e7754ea3083b441699ea6f385408ab30c02
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 0.9995

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://pelibifir.ru/strik?utm_term=proof+that+evolution+is+a+fact PDF link annotation
    • http://mignonette.space/xokibelufakanudaj8inz.pdfIn PDF document text
    • http://terasivox.22web.org/soul_music_70_s_free.pdfIn PDF document text
    • http://dirtygirl.fun/el_moasser_math_1st_secondary_guide_answers3miuo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380523/normal_5fd1a31821181.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503279/normal_605c725d8e947.pdfIn PDF document text
    • http://toxedixekerej.22web.org/93603277152.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418970/normal_600e62356fcc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412758/normal_60500ffc28b9a.pdfIn PDF document text
    • http://ses-sanobrabotka.ru/emerson_led_tv_turns_on_but_no_pictureuyist.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459062/normal_601736ff01397.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://67bb8873-ca08-4da4-87c0-60a8072ebff6.filesusr.com/ugd/a838c0_e8ccd591b48b4d278db0b37cb6e89c6a.pdf?index=trueIn PDF document text
    • http://mowilutom.epizy.com/apa_format_reference_generator.pdfIn PDF document text
    • http://nutujetis.rf.gd/zepinokesovowop.pdfIn PDF document text
    • http://jovuxajir.rf.gd/zusazajabazulonubaletin.pdfIn PDF document text
    • http://guligakifiw.epizy.com/1999_jeep_grand_cherokee_wont_start_but_has_power.pdfIn PDF document text
    • https://72858ab8-d36f-4bc2-b208-e5ec56e76d01.filesusr.com/ugd/3a4e0e_9241d09d6bcb406da93ba8de3f853653.pdf?index=trueIn PDF document text
    • http://fekepoloper.rf.gd/como_hacer_referencias_bibliograficas.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/lifazinitafir.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/examples_of_allusion_in_romeo_and_juliet_act_4.pdfIn PDF document text
    • http://ragomoxos.rf.gd/abstract_expressionism_book.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/60568021510.pdfIn PDF document text
    • https://945c5b1a-9feb-4a08-b72d-c905ca1b1520.filesusr.com/ugd/27135d_9bb35040479b4f1a91941974ac804aad.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17392 5032 bytes
SHA-256: c360b108f9a343b69dcf0bb2cffef8b6b9a64ddf0fbd7b9e1c9879b8acc615f4
font_01_sfnt_off000184b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x184B1 11368 bytes
SHA-256: c9d7db2cc319aada7bc941106b086ca8d669261815f66c649aa74917a0044110

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