Malicious PDF — malware analysis report

Static analysis result for SHA-256 e45ecb24854b4994…

MALICIOUS

PDF

78.1 KB Created: 2021-02-22 11:58:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c67dcfa438713bbb2e3bc75e53bc332b SHA-1: 6ef577e30e4f9f01a5a0741fd15744d072648c08 SHA-256: e45ecb24854b499463e9b5e86d3e3b9949f766e1bcfbc7582415ae722415f38d
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the 'PDF_SEO_LINK_FARM' heuristic, suggesting it's designed to direct users to malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure points to a link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://jottigo.ru/123?utm_term=love+dare+for+parents+day+8 PDF link annotation
    • https://cdn.sqhk.co/levowexesu/phi6Yic/velodrome_track_day.pdfIn PDF document text
    • https://cdn.sqhk.co/xawodoze/kicKuHq/online_shopping_uk_pakistani_clothes.pdfIn PDF document text
    • https://cdn.sqhk.co/pajokiman/ibYiGkE/superheroes_playground_human_ragdolls.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/367a7.pdfIn PDF document text
    • https://cdn.sqhk.co/meduxemij/DHShcPC/brutal_age_horde_invasion_hack_apk_download.pdfIn PDF document text
    • https://zegoliro.weebly.com/uploads/1/3/2/3/132303320/monovupaniti-depekuvozel-demilekitiw-pufoko.pdfIn PDF document text
    • https://gogadumipoti.weebly.com/uploads/1/3/1/0/131070618/sawazewu.pdfIn PDF document text
    • https://supagerafigi.weebly.com/uploads/1/3/0/8/130874211/sibetovamidosovadapi.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/ghcMjcD/wingstop_locations_mn.pdfIn PDF document text
    • https://cdn.sqhk.co/xunijejozi/eQgi6Yf/xodamitosanisi.pdfIn PDF document text
    • https://cdn.sqhk.co/kuvapipitol/fSghfgg/34631699881.pdfIn PDF document text
    • https://cdn.sqhk.co/xedasuzefer/jjghjcn/pixel_gun_3d_racing.pdfIn PDF document text
    • https://cdn.sqhk.co/momebuman/ijentia/99842668153.pdfIn PDF document text
    • https://mafetoga.weebly.com/uploads/1/3/0/8/130874134/608562f492cca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/faduxodiwo/vavefajiku.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/jozitaninataloxarewip.pdfIn PDF document text
    • https://s3.amazonaws.com/jivamubug/54395284390.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/who_were_the_viking_gods_ks2.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/adobe_acrobat_pro_dc_with_subscription.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/20399562272.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D8 5040 bytes
SHA-256: b89e6e6fb1c5cadaa99ce93ccb84f74bb0afe993a54b2db07a24bdf5303f3c79
font_01_sfnt_off0000f813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF813 10888 bytes
SHA-256: afcfbbd3d61fdbd7d3e214b802fa8a56419b1a7c5cd69ca773fb22d6665935d4
font_02_sfnt_off00011d2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D2F 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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