Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b92ec2506105417…

MALICIOUS

PDF

75.6 KB Created: 2021-03-02 06:14:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 38ad5ab3947dc478c511f53d998d42ac SHA-1: 376e4c4fcc7380d2653eca742761b1e1fd907507 SHA-256: 9b92ec2506105417695046d76a00eedaf79784a8545a45a497d64db3652d0654
196 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 point to domains that appear to be part of a link farm. The heuristic 'PDF_SEO_LINK_FARM' indicates a significant number of generated SEO PDF links. The presence of a password protection lure suggests an attempt to bypass security controls by encrypting a payload. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://lozipotod.ru/123?utm_term=sony+xplod+radio+bluetooth+verbinden PDF link annotation
    • http://domsale.xyz/cub_cadet_ltx_1042_kw_drive_beltf7d7z.pdfIn PDF document text
    • http://sowoxapexemex.sportsontheweb.net/86759192880.pdfIn PDF document text
    • http://xepuxesadara.mypressonline.com/who_built_the_moon_espaol.pdfIn PDF document text
    • http://spindlndou.space/16765995119qvwes.pdfIn PDF document text
    • https://milorupubi.weebly.com/uploads/1/3/4/3/134317418/tumakisuxutose_pukotusofevuku_povarol.pdfIn PDF document text
    • http://takipleskazan.org/why_do_i_get_water_bubbles_on_my_handswivlp.pdfIn PDF document text
    • http://idslim-italia.site/cuneiform_mesopotamia_definitionws4jr.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/jdZB4hg/birthday_theme_ideas_for_mom.pdfIn PDF document text
    • http://idealicaitaly-ufficiale.site/sam_cengage_powerpoint_exam_answers1oyk2.pdfIn PDF document text
    • https://cdn.sqhk.co/sifajoxojif/ha2Ajes/old_bingo_pinball_machines_for_sale.pdfIn PDF document text
    • http://finuxezanasa.mygamesonline.org/wizards_first_rule_hardback.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://doriponesarom.myartsonline.com/what_is_the_importance_of_potential_and_kinetic_energy_in_our_daily_life.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/boiling_point_determination_lab_report.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/spongebob_imagination_meme_template.pdfIn PDF document text
    • http://pelebirepopo.onlinewebshop.net/80922627708.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/bitexerekoj.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/kalefaxutatolavuge.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/83159159204.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AA 5344 bytes
SHA-256: 0642f371ec09f2e1dc7bae0f6be7dfb1545ac303c50edbd455c01cad79b7eb16
font_01_sfnt_off0000f9d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D6 11784 bytes
SHA-256: 3b7147d2bbcf0135ec746bb5b473b449964b6bb5f5d6ede5793e090d5b00f1a3

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