Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f55816f4ad3a9b7…

MALICIOUS

PDF

65.2 KB Created: 2021-02-16 12:47:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: d4c851c52c8080245afc4c356c1b542c SHA-1: f65b0fc2b534a372c5e2145c6d116d5c7da484fe SHA-256: 1f55816f4ad3a9b79e2c35497bf0dc4c1ff060741b266632a5171fe2f7fce2c1
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://druttle.ru/wix?keyword=cell+city+analogy+worksheet+create+your+own+analogy PDF link annotation
    • http://libertinemodels.com/venus_in_the_sky_tonight_irelandqczrc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470825/normal_601a99da06e1d.pdfIn PDF document text
    • http://pesale.pro/finatajozepep3vj04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452845/normal_601ca6c7d5821.pdfIn PDF document text
    • https://cdn.sqhk.co/kavejufa/eHkvjji/38144586252.pdfIn PDF document text
    • https://visuwinewuj.weebly.com/uploads/1/3/1/4/131407241/vebexusug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382617/normal_6019bf3c2d37d.pdfIn PDF document text
    • http://arevakar-travel.com/arena_of_valor_switch_deadlsyed.pdfIn PDF document text
    • http://nicepics.xyz/fibijukelamixospnov.pdfIn PDF document text
    • https://cdn.sqhk.co/pikuworano/ghBSjaN/design_home_house_renovation_download.pdfIn PDF document text
    • http://card2card-perevod24.site/string_format_c_date_yyyy_mm_dd0lfu5.pdfIn PDF document text
    • https://gimuloge.weebly.com/uploads/1/3/0/7/130775506/sexoxuve.pdfIn PDF document text
    • http://daravto18.ru/16880458144n7gbh.pdfIn PDF document text
    • http://arm-watch3.club/69607126358e1tdt.pdfIn PDF document text
    • http://womenit.space/todoxanodokumalogexamamusxadgf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454811/normal_5fff195098708.pdfIn PDF document text
    • https://wozukepob.weebly.com/uploads/1/3/4/0/134017809/wixugafofisowiwavaji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369915/normal_600d951872c3e.pdfIn PDF document text
    • https://cdn.sqhk.co/gezefesete/gmAjihd/anthill_farms_syrah_2016.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374366/normal_5ffe4740ef11e.pdfIn PDF document text
    • https://narezivif.weebly.com/uploads/1/3/5/3/135307162/8435939.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426415/normal_60110192e0fab.pdfIn PDF document text
    • https://cdn.sqhk.co/ferorigife/jihigdd/13989815.pdfIn PDF document text
    • http://findattime.com/linomagewulilau9jnc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c4e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4E1 5224 bytes
SHA-256: 0a431275b4dc8147a1eebd371d7f93f8888946319517413e7b27a3fdf040571f
font_01_sfnt_off0000d6bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6BC 9456 bytes
SHA-256: 79b7d1778cdc4ee1d6f2e4e9691add930b4831fadc4a4ac5a22c11b956abbe8f

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