Malicious PDF — malware analysis report

Static analysis result for SHA-256 993437577d525185…

MALICIOUS

PDF

71.9 KB Created: 2021-02-28 16:27:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b0b45623a1b6694ac405f664a63ade9d SHA-1: 8b88d8d023431bf492738ad13a076d0f8212519c SHA-256: 993437577d5251851772df15e45dcd3cd80d6d94c3810f49458c7ae304f518a6
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=ruger+sr22+purple+grips In PDF document text
    • http://serikanipesemo.iblogger.org/37689190573.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizilo/gibQigd/xozulasezoxozemuv.pdfIn PDF document text
    • https://nisikigibifug.weebly.com/uploads/1/3/0/8/130813528/7318018.pdfIn PDF document text
    • http://ing-cliente.com/safujumijomujoxebiwo4cypc.pdfIn PDF document text
    • https://cdn.sqhk.co/zitibidino/djhijc1/ahs_amino_for_american_horror_story_season_9.pdfIn PDF document text
    • https://tatujudipopef.weebly.com/uploads/1/3/4/6/134605081/83836.pdfIn PDF document text
    • https://cdn.sqhk.co/kinerufi/LaOKjaN/zuru_x_shot_max_attack_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/zisubiziwu/hdEVhes/virtual_races_2021_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/jivazufevi/hjHjfhj/advance_auto_parts_jobs.pdfIn PDF document text
    • https://cdn.sqhk.co/mudemodox/haLjbEp/stick_sniper_games_online.pdfIn PDF document text
    • http://proba7.xyz/notezetucppxr.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/QihhVjL/pinata_hunter_1_hacked.pdfIn PDF document text
    • http://razejeperijifop.22web.org/galekodesakamabo.pdfIn PDF document text
    • https://wewiruvikaju.weebly.com/uploads/1/3/0/7/130775929/7109346.pdfIn PDF document text
    • https://puziwifatewir.weebly.com/uploads/1/3/4/7/134715637/7029534.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lojiwifi.epizy.com/mimenixekajigedetirew.pdfIn PDF document text
    • http://kijijagasakum.rf.gd/tosesotogilanav.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_off0000dc4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC4F 4916 bytes
SHA-256: 93e1f222edcb77d8fb6f403e829639a46ebe9e7636c70c1f43e5a7c25feb3788
font_01_sfnt_off0000ed24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED24 11004 bytes
SHA-256: d8856639e7ac6a071f53ada97f4d7effe80a07d127062d3363f2639a7833cb5c