Malicious PDF — malware analysis report

Static analysis result for SHA-256 485c6bedf69719e7…

MALICIOUS

PDF

79.0 KB Created: 2021-03-31 00:58:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c1d0dd2ba678c2840181519d8bfde55 SHA-1: 1dcca03f0ae583fe98756b8c1496b36a80bfb485 SHA-256: 485c6bedf69719e76028167eea97538e6dbc9d6a5f52d4e1f1e5bed2d474bbdf
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 as a link farm, with the primary goal of directing users to potentially malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing or trojan activity. While no scripts were directly extracted, the PDF structure and embedded URIs suggest an attempt to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/strik?utm_term=how+much+does+usps+charge+per+pound
    • http://delaem-sami.online/pemizajorujug41c8.pdf
    • https://cdn.sqhk.co/remigalakefo/ihhjgji/transitional_words_and_phrases_answer_key.pdf
    • https://vunisanelebori.weebly.com/uploads/1/3/3/9/133999195/defunukafad_veporur_bowezereta.pdf
    • http://rivafigikiwax.medianewsonline.com/sulajigogawob.pdf
    • http://autolombardpro.ru/standard_affidavit_form_zimbabwep4077.pdf
    • http://zekaxezixil.medianewsonline.com/48215565492.pdf
    • http://reetodo.online/greatest_common_factor_worksheet78bck.pdf
    • https://zikovawezuve.weebly.com/uploads/1/3/1/1/131164456/a319faf.pdf
    • https://cdn.sqhk.co/bisuligiga/1iihcdt/mechanical_live_wallpaper_animated_keyboard.pdf
    • http://barcaporirternet-interbank-pe.com/how_long_to_cook_a_stuffed_20_lb_turkey_in_a_roasternlayo.pdf
    • https://cdn.sqhk.co/pupoxobumake/jvrNje8/60054649823.pdf
    • https://gejodawutu.weebly.com/uploads/1/3/1/1/131164152/ruvuvi.pdf
    • http://rapiwanijisage.scienceontheweb.net/lurujum.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vefodipox.myartsonline.com/what_is_cartesian_coordinate_system.pdf
    • http://zogadawedalifap.onlinewebshop.net/catheter_sus_pubien.pdf
    • https://1dab3517-3db0-43ff-9fd6-b65b51f65b60.filesusr.com/ugd/565485_60cfaebce34149f0b88fb3d575dddc2f.pdf?index=true
    • https://77abcf6a-1f47-4233-a5f7-28832101be0a.filesusr.com/ugd/e29e5c_47b699591f4d4e0bb5daf8a63d22f4d7.pdf?index=true
    • https://de315c38-daa2-4293-b666-e554ba9b7d65.filesusr.com/ugd/564d2e_2e177bb532404b4d83b3a8b2e81e4575.pdf?index=true
    • https://e9b66cc5-9289-431c-8f17-6739e1cd2d88.filesusr.com/ugd/c8f33b_8f890945a546489bbde3eb52f8c2efca.pdf?index=true
    • https://uploads.strikinglycdn.com/files/95588cfb-7da8-4cb9-a1ec-cec432dd7de8/download_and_install_big_fish_games_manager.pdf
    • https://uploads.strikinglycdn.com/files/6546cc5b-3d3c-45eb-baeb-71d3831dffa7/27496871317.pdf
    • https://0926596c-b1e6-4473-87d6-fed2e709bfeb.filesusr.com/ugd/e2a635_5fa1fe03c62b49169eafaf92d844e453.pdf?index=true
    • https://uploads.strikinglycdn.com/files/cf393786-a39b-4cca-8268-87ad08b55904/85459079024.pdf
    • https://uploads.strikinglycdn.com/files/f561edd6-6461-4d65-ae07-53c531f0936a/25646587449.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_off0000f6ab.bin
4843a33afc338810a6f27015e8e1a5e498234102d65fb6a4910d2e14bc8d34bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AB 5508 bytes
font_01_sfnt_off0001094c.bin
0cee86d0397d9161e84beabb18813d7e06860e2937517f27839568a586df131d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1094C 10820 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.