Malicious PDF — malware analysis report

Static analysis result for SHA-256 489503abfcbb32c1…

MALICIOUS

PDF

89.9 KB Created: 2021-03-05 01:36:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 13cf55220ca97f82055bf787630c467d SHA-1: d671fdbcf082732bbf646b558adcdc3d7ce05952 SHA-256: 489503abfcbb32c19a7fb30572484b41ab43f9c745d9b92489176a242d2fcad9
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 0.9990

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://mezovuduw.ru/strik?utm_term=why+is+my+xfinity+stuck+on+the+welcome+screen PDF link annotation
    • http://walletelectrum.buzz/fudge_a_mania_movie_trailerkffpw.pdfIn PDF document text
    • http://zikapipumimapo.22web.org/vefobur.pdfIn PDF document text
    • http://circulyarkadigital.xyz/41277210987jbown.pdfIn PDF document text
    • http://lightsex.ru/89700746410na3tg.pdfIn PDF document text
    • http://daravto18.ru/race_for_the_galaxy_strategy_guidevs0gh.pdfIn PDF document text
    • http://goldenframecollision.com/vijenocp02s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456134/normal_5fdbe2bb65657.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416654/normal_5ff9c43aa839f.pdfIn PDF document text
    • http://kulokozataxat.22web.org/email_newsletter_template_html.pdfIn PDF document text
    • http://zodazaze.22web.org/99245078179.pdfIn PDF document text
    • http://faripofijukevom.mywebcommunity.org/39918884044.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492918/normal_603f498730181.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/d48a1761-b492-4601-8b51-60ccecba43d6/31660971786.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7c86d1e-953e-499c-b524-8d13cf176e41/what_happened_to_senator_sam_foley_in_washington_who_will_appoint_the_new_senator.pdfIn PDF document text
    • http://fisowafoz.epizy.com/what_motherboard_does_a_dell_optiplex_780_have.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/505bdfaf-b26d-4ced-a7e1-2a56e4dd557f/tyt_th_9800_microphone_modifications.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/554b1fb4-a6c8-49b5-9494-3b0acebbda37/95706110338.pdfIn PDF document text
    • http://vifidumefitur.atwebpages.com/brunswick_string_pinsetter_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c75796bf-b52d-4361-a9bd-16b7311f93af/once_upon_the_hill_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd8f80ab-aa40-4896-959e-2f65d121d6a3/7405829322.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/406e0fc3-52d0-42d4-8ec7-da6d7d62c2c0/99103020079.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ed9c991-e470-4eba-90c2-53a17bcb9691/tepumexojizus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a0aef67-158e-4a0a-927a-283d42fc678e/78305738633.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001104d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1104D 3452 bytes
SHA-256: a98573e9be898cca88c106b47d19b9d1551c1f498ced5abb2e5502c2d645f701
font_01_sfnt_off00011cba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CBA 5248 bytes
SHA-256: 297d18bb30829100a12ba8a105c23f7753152cb8d280266a3fce1aa54125a63b
font_02_sfnt_off00012e96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E96 13476 bytes
SHA-256: c60e331293c8667776ffdb2d80b912db9dd1372e9ac0b72b96322c0ec5ebecf1

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