Malicious PDF — malware analysis report

Static analysis result for SHA-256 57ec58af6647e672…

MALICIOUS

PDF

78.3 KB Created: 2021-02-13 06:39:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68efd8adb3c08cf8fa39f9b0362203cd SHA-1: e5dd7912c766f87ffd8e93ef59466797fbceca48 SHA-256: 57ec58af6647e6722e83b7a990b8c98b5851a50d8e48936bcbece07a84e53e06
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent link pointing to 'https://seumenha.ru/wix?keyword=children%2527s+garden+daycare+columbia+sc', suggesting a lure to a malicious website. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, many of which are likely SEO-related, further supporting the malicious intent. ClamAV detection and ML classification strongly indicate this PDF is malicious, likely a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wix?keyword=children%2527s+garden+daycare+columbia+sc
    • https://cdn.sqhk.co/rinugezig/R6kGijd/sonny_perdue_net_worth.pdf
    • https://zawivipesanupi.weebly.com/uploads/1/3/4/7/134724715/sutabasosibi-denuwapuwar-zerogaresejojaz-werakevek.pdf
    • http://hookup153.online/xuwitujoruzabi1go0w.pdf
    • http://healthbeauty24.online/white_blank_imagex7fwp.pdf
    • http://alkostore.xyz/bogelapadexevatagoaitim.pdf
    • https://cdn.sqhk.co/gerukoso/UfUP2jK/sotumiwejasuzopavetol.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wefemabeni/rengar_guide_season_9.pdf
    • https://s3.amazonaws.com/zeworibuzoza/get_defensive_answers.pdf
    • https://s3.amazonaws.com/rakabexozu/cbse_net_2017_november_answer_key.pdf
    • https://s3.amazonaws.com/bulikowexunepov/child_labour_in_pakistan_ppt_free.pdf
    • https://s3.amazonaws.com/wuvepilamamuse/burkes_beach_surf_report.pdf
    • https://s3.amazonaws.com/jarawaxanivu/subinupagafigigawipulox.pdf
    • https://s3.amazonaws.com/kopisigapub/java_8_update_161_free.pdf
    • https://s3.amazonaws.com/kalanejaxutilif/konudulamugixububu.pdf
    • https://s3.amazonaws.com/fidefofudi/christmas_images_jesus.pdf
    • https://s3.amazonaws.com/purufiz/aspekto_ng_pandiwa_worksheet_grade_3.pdf
    • https://s3.amazonaws.com/rizoli/maya_wrap_deformer_weight.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6bc.bin
f371365bf8d70c1c90b32646d37c9cebd48f29324dc5f31d79a3897028c7dc6c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BC 5532 bytes
font_01_sfnt_off00010968.bin
c107e9f46d729e4167b1dd825f426a3602cd195a8f26add22dae3d86854b99d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x10968 10240 bytes