Malicious PDF — malware analysis report

Static analysis result for SHA-256 d55c5e8d59887eda…

MALICIOUS

PDF

73.2 KB Created: 2021-02-26 03:25:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: cb246a73f3cbed2a989019129bf8a6a9 SHA-1: bd9fef24fc86fe5c06065a61307711e6c371987a SHA-256: d55c5e8d59887edaa7bcf80075eb426c327a35ed0925b2abca67d24c5d8482e8
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://crophysi.ru/award?keyword=why+heater+wont+turn+on+in+house In PDF document text
    • https://cdn.sqhk.co/lanumakefu/hyijghi/csr_racing_2_tipps_deutsch.pdfIn PDF document text
    • https://cdn.sqhk.co/zalivelo/gjlgjxr/12851260434.pdfIn PDF document text
    • https://dafalozurevibi.weebly.com/uploads/1/3/4/3/134308304/7011596.pdfIn PDF document text
    • https://cdn.sqhk.co/jurugaguvedu/Ajf78A3/tuzoz.pdfIn PDF document text
    • https://cdn.sqhk.co/zapusukajev/7idjfbj/supposedly_meaning_in_tagalog.pdfIn PDF document text
    • https://javufivupa.weebly.com/uploads/1/3/4/3/134349262/faaec87043.pdfIn PDF document text
    • https://vokuduvalabi.weebly.com/uploads/1/3/4/5/134502282/3585079.pdfIn PDF document text
    • http://dewobazul.22web.org/44527533705.pdfIn PDF document text
    • https://pafegesufo.weebly.com/uploads/1/3/4/7/134719460/fufojupamutib_dofedixufokexud_pujudebeb_kizubipuvo.pdfIn PDF document text
    • http://fezelaradelemuj.22web.org/microsoft_authenticator_app_minimum_android_version.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/convert_html_to_angular_7.pdfIn PDF document text
    • http://puxebipupaluna.rf.gd/what_is_the_moral_of_the_story_little_red_riding_hood.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/hiding_out_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/55467402733.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/wipabegu.pdfIn PDF document text
    • http://wozunajovufati.rf.gd/aprilaire_800_installation_manual.pdfIn PDF document text
    • http://girupesoja.rf.gd/kifafukabisadozaja.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_off0000e395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE395 4948 bytes
SHA-256: 98b6213fbf031f5ead23dc09cc18b829ead2e01d0cab02c45579e4d342f3b809
font_01_sfnt_off0000f480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF480 10396 bytes
SHA-256: 3496cf0bea689c814f7100af24c2dff915e866303a1f5a5dd5ef36daaddd0391

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