Malicious PDF — malware analysis report

Static analysis result for SHA-256 630a968ca3d473de…

MALICIOUS

PDF

83.3 KB Created: 2021-01-27 18:28:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 32d114e2f3dd6593422944c7107531c2 SHA-1: 131705a38db8ce63f256004515813b71f32210d5 SHA-256: 630a968ca3d473deb3bf5f574d4888e0188211e4228510ba5275206f452b573e
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which appear to be SEO-driven and point to potentially malicious content, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The embedded URLs and the nature of the heuristics point towards a spearphishing attachment used to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://seumenha.ru/wb?keyword=subway%20clash%203d%20series PDF link annotation
    • https://cdn.sqhk.co/wazafanez/gHhchjX/59681752238.pdfIn PDF document text
    • https://cdn.sqhk.co/someteku/iczjehc/samsung_music_android_auto.pdfIn PDF document text
    • https://cdn.sqhk.co/golomamone/CThaihS/download_edge_lighting_colors_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/titabofasika/cdgfhip/mastercraft_auto_repair.pdfIn PDF document text
    • https://fozogefijegajor.weebly.com/uploads/1/3/1/4/131453134/7ed0a3a.pdfIn PDF document text
    • https://cdn.sqhk.co/vopunokapire/Rhezbgi/pnc_merchant_services_phone_number.pdfIn PDF document text
    • https://cdn.sqhk.co/jefapukawore/igfl3gi/mitur.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/ccGhg2c/55839898806.pdfIn PDF document text
    • https://cdn.sqhk.co/rewufarelaze/ijjKieP/lifudabejekipepu.pdfIn PDF document text
    • https://cdn.sqhk.co/butituguxur/eX9R7jg/bradesco_compra_banco_nos_estados_unidos.pdfIn PDF document text
    • https://cdn.sqhk.co/rifokinimito/ibjegcR/ghosts_of_mars_2001.pdfIn PDF document text
    • https://cdn.sqhk.co/tefozakozup/2uiiCj2/mens_medium_length_haircuts_for_straight_hair.pdfIn PDF document text
    • https://cdn.sqhk.co/kamozipu/b0jk5ut/winky_lux_flower_balm_review.pdfIn PDF document text
    • https://cdn.sqhk.co/wajidafix/ha1difi/absorption_costing_vs_variable_costing.pdfIn PDF document text
    • https://cdn.sqhk.co/gikunixa/oxgc6jf/23038394045.pdfIn PDF document text
    • http://regvoolkim.website/end_credits_meme_song_downloadfw7lv.pdfIn PDF document text
    • http://rimka.xyz/love_heart_emoji_coloring_pages1a2oe.pdfIn PDF document text
    • https://cdn.sqhk.co/janawezexoj/hiijgUK/xodixop.pdfIn PDF document text
    • https://cdn.sqhk.co/pasivuzuke/YhbggK9/cook_county_clerk_court_criminal_case_search.pdfIn PDF document text
    • https://tevumusavobe.weebly.com/uploads/1/3/4/1/134108657/lijin-wovafepasafojog-jigozasogaxogu.pdfIn PDF document text
    • https://cdn.sqhk.co/konanetufuda/higigRb/alamat_u_mobile_centre_melaka.pdfIn PDF document text
    • https://kipigifusulip.weebly.com/uploads/1/3/4/4/134437712/wiwuboxutaratut.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
    • 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE90 5212 bytes
SHA-256: c23a3c9eddd8265c31e88cc1f25681c5f3801e37206f9dbdac33a086e2a98acd
font_01_sfnt_off0000f059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF059 15420 bytes
SHA-256: 7529c0869a09266cc3072f42e1aae7052a333073fb84e5503cd7faf07233a0ba
font_02_sfnt_off00011c31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C31 16208 bytes
SHA-256: 6a9c99c8ff992da287ea73859445fc24fa95bc6ae6f07d8120819ed37ace9c96
font_03_sfnt_off00013168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13168 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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