Malicious PDF — malware analysis report

Static analysis result for SHA-256 b117af251a561c08…

MALICIOUS

PDF

98.3 KB Created: 2021-04-01 14:03:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fe67935bb07bb45527a3bec5463913a6 SHA-1: 93645f201679d8d2dfa56a820ed1dd4ecf00ffd8 SHA-256: b117af251a561c08a98653e366e514249962567c3c9c763a3bcb780a59d99bad
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://yafferge.ru/aws?utm_term=sony+a300+camera+price In PDF document text
    • http://zunuruxeguxifi.mygamesonline.org/6._snf_sosyal_bilgiler_test.pdfIn PDF document text
    • https://xewuligatojijow.weebly.com/uploads/1/3/5/3/135395235/8806744.pdfIn PDF document text
    • http://helplnstagramcontact6088758.com/how_to_calculate_change_in_working_capital_from_balance_sheet32d7h.pdfIn PDF document text
    • http://vezdesami.ru/social_media_marketing_business_plan8gize.pdfIn PDF document text
    • http://allerlo.xyz/foloxafemuzefepuxiuumk.pdfIn PDF document text
    • https://cdn.sqhk.co/sapugelezuf/KUNhaif/zejizinokowimaw.pdfIn PDF document text
    • https://jamakebowixon.weebly.com/uploads/1/3/4/4/134477175/7dcfe3d1aeff842.pdfIn PDF document text
    • https://jomupalekiloja.weebly.com/uploads/1/3/4/3/134310494/6541358.pdfIn PDF document text
    • https://fojaxekixuwid.weebly.com/uploads/1/3/4/7/134743661/31f0f9b.pdfIn PDF document text
    • http://desokore.medianewsonline.com/who_needs_to_be_iso_27001_certified.pdfIn PDF document text
    • https://lutaxabivuk.weebly.com/uploads/1/3/0/7/130740512/zukuvepive.pdfIn PDF document text
    • https://zoxiniguve.weebly.com/uploads/1/3/4/5/134584112/41819d1bda2a.pdfIn PDF document text
    • https://likomajuf.weebly.com/uploads/1/3/5/3/135321460/mixivux_verurin_turuwaxezad.pdfIn PDF document text
    • https://vomagorawu.weebly.com/uploads/1/3/4/7/134720662/tegejemabil.pdfIn PDF document text
    • http://medyayazilimtr.com/journey_to_the_west_1996_sub_indo_downloadx8rs6.pdfIn PDF document text
    • http://itchia.space/kuletumubulonapupuryexid.pdfIn PDF document text
    • https://teribupugabi.weebly.com/uploads/1/3/4/8/134852699/kituviguvubipi.pdfIn PDF document text
    • https://cdn.sqhk.co/kakapoxavu/jhijjd9/gewapuxifomixagufifivozu.pdfIn PDF document text
    • https://cdn.sqhk.co/zalopubid/8yhjmGH/axa_equitable_variable_annuity_withdrawal_form.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/91216739-003c-48aa-a3c1-19415ff5caac/how_often_should_you_put_ridex_in_your_septic_tank.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26155224-e694-4187-9293-20bf28005e3a/how_to_lose_weight_if_you_are_11_years_old.pdfIn PDF document text
    • http://lifobem.myartsonline.com/reduction_formula_for_integration_of_sin_n_x.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b936ac0d-f1a2-4786-93ae-566175d3c869/39994418457.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d6bc0b9-762e-4fb7-b240-21bf04c2d872/marantec_m55_garage_door.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb3033b1-c7f0-4ff0-994a-a8c73c874afa/7118048108.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012b54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B54 5380 bytes
SHA-256: 5e80c62fd41672c52ceacf6169895b706ebf0aa21716dd3be021be06cf3fd7bc
font_01_sfnt_off00013d94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D94 11316 bytes
SHA-256: 28a784710375c841b04c138a8dbb0309213dd5c3b62fcc0cc4a3dbc6ffbba823
font_02_sfnt_off00016464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16464 16164 bytes
SHA-256: e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6