Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca87533d82fa256e…

MALICIOUS

PDF

75.8 KB Created: 2021-02-18 11:54:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: a41a78132c49220752d3dc1aaf8bfce3 SHA-1: 550b55a4ed4ae9e7d5e411a390bcdd560be1345e SHA-256: ca87533d82fa256e9f88aa82e4d1ba3016fb9b5427ae8160661dc58498df8ba8
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicative of a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains text related to search queries, reinforcing the lure aspect.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/wix?keyword=is+synchro+summon+a+special+summon PDF link annotation
    • https://tuxufinuzeleki.weebly.com/uploads/1/3/4/7/134737217/9090588.pdfIn PDF document text
    • http://streichpack.online/horizon_7._8_treadmill_reviewsg0h86.pdfIn PDF document text
    • http://blog-millionaire.buzz/39358281703wr1wl.pdfIn PDF document text
    • http://liketime.online/marketing_definition_product_promotiondxz69.pdfIn PDF document text
    • http://8gusevshop.space/befopubajazubiju4n3m.pdfIn PDF document text
    • https://cdn.sqhk.co/zijopenuxafi/DLVXijj/paradise_city_island_simulator_bay_apk.pdfIn PDF document text
    • http://strapslap.online/lords_mobile_familiar_guidel9ndj.pdfIn PDF document text
    • https://kepiloxuxamife.weebly.com/uploads/1/3/0/7/130740378/bbffd549e.pdfIn PDF document text
    • https://pogudemuzam.weebly.com/uploads/1/3/4/0/134018755/pisibiga_penobasitebagu_nakasulawaxuda_finefifowatiboj.pdfIn PDF document text
    • https://cdn.sqhk.co/kajurineg/Vipghhc/pet_paradise_charlotte_north_carolina.pdfIn PDF document text
    • http://cmbclientes.com/8548327428675q4o.pdfIn PDF document text
    • https://cdn.sqhk.co/jikogifuxa/hggeD7W/55319518671.pdfIn PDF document text
    • https://dipedupaketi.weebly.com/uploads/1/3/4/3/134333799/podefiniduxenik.pdfIn PDF document text
    • http://idealicaitalia-ufficiale.site/mumiledered1uub2.pdfIn PDF document text
    • http://1xbet-registrat.site/what_were_the_three_estates_of_french_society_before_17893cipq.pdfIn PDF document text
    • https://cdn.sqhk.co/pegatorapo/2Tifhgm/numero_do_banco_bradesco_para_transferencia_doc.pdfIn PDF document text
    • https://cdn.sqhk.co/sezepemanu/6jd0hgf/29171745821.pdfIn PDF document text
    • http://zuvibig.22web.org/15548652957.pdfIn PDF document text
    • http://cashbackk.site/funny_answers_to_question_how_are_youg60ux.pdfIn PDF document text
    • http://limons.space/1499005911hq1uq.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1EC 2880 bytes
SHA-256: aff11289bf87f92bc53c0e2abc335208e29b6db8a954e82fd0a5595ffa95d344
font_01_sfnt_off0000ec2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2A 5212 bytes
SHA-256: 43860e1388973a11d98681027f0617d4f7eea0be4b1a1edcbef6f6fa4e2d7340
font_02_sfnt_off0000fdc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC2 10432 bytes
SHA-256: 0c1a9de6a33f060de2e97815f208f14951a4557a68b2816773d1d5bede835e13

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