Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dc12ec737eaaabb…

MALICIOUS

PDF

76.7 KB Created: 2021-03-12 18:02:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8411a73d10d6af0e8f5cb258fc702ff SHA-1: 7308412848273912c8d493f986f204c9572c4b3e SHA-256: 9dc12ec737eaaabb9692371d59120c4462daafa5c1ea68e229a0741f747a11c2
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains a large number of external links, suggesting it is part of a link farm or phishing campaign. The embedded URLs are likely used to redirect users to malicious sites for further exploitation or credential harvesting.

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/123?utm_term=hyundai+accent+2011+manual
    • https://cdn.sqhk.co/mopijiluxu/ggRifhd/harvest_moon_friends_of_mineral_town_marry_popuri.pdf
    • https://kitedagipan.weebly.com/uploads/1/3/4/8/134892955/5dce949ba55e162.pdf
    • https://cdn.sqhk.co/vixonafom/HGbgevP/slots_vegas_magic_free_casino_slot_machine_games.pdf
    • https://cdn.sqhk.co/tisewesir/zXpigia/there_you_go_johnny_gill.pdf
    • http://xufelaketodo.getenjoyment.net/72972391784.pdf
    • https://cdn.sqhk.co/talidapato/R1JpA0b/suwakejufokudotel.pdf
    • https://cdn.sqhk.co/janawezexoj/jdCWthi/free_online_video_editor_like_windows_movie_maker.pdf
    • https://cdn.sqhk.co/duwefetufe/bjc4KDI/4ft_led_spiral_christmas_tree.pdf
    • https://cdn.sqhk.co/porodiwaten/Zkmg2he/hide_and_seek_epic_fail.pdf
    • https://cdn.sqhk.co/rorifugera/dgjgiih/mastercraft_courser_axt2_285_70r17.pdf
    • https://cdn.sqhk.co/mofijovelu/1ADjdzS/sleep_your_fat_away_login.pdf
    • https://dapekedes.weebly.com/uploads/1/3/4/6/134643928/lefuzokelaped.pdf
    • https://fedonofawok.weebly.com/uploads/1/3/4/8/134881994/1e2dcdb2b138f0.pdf
    • https://berekiba.weebly.com/uploads/1/3/1/4/131482976/xizoziradewib_duwuge_moxagodetin.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://2863666b-9d79-467d-9aad-9eeb6dafbdf2.filesusr.com/ugd/6ee3eb_e8c1742eb0b848748c8885d67681cdae.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d2a28862-2e67-468d-96b1-69eb0f43c805/sources_of_the_making_of_the_west_volume_1_4th_edition.pdf
    • https://dcc20dec-0195-4543-b617-cfb82efd15f0.filesusr.com/ugd/30ea26_1c9d7aadd6f14eb0a73117cc555ee6fb.pdf?index=true
    • https://uploads.strikinglycdn.com/files/46e986ad-9b4c-4413-acb0-5e8872babeaa/what_are_developmental_theories_and_how_are_they_useful.pdf
    • https://uploads.strikinglycdn.com/files/5f344358-a83d-4596-a73c-24dbe1ea4294/kunoriwemofoxokujavojetix.pdf
    • https://uploads.strikinglycdn.com/files/1d61af81-893e-476f-a37b-d8ab122a8597/zafalumufegekitum.pdf
    • https://uploads.strikinglycdn.com/files/11bb9be1-6203-4418-960c-4915a2a6ad5e/frigidaire_fridge_repair_manual.pdf
    • https://b304dada-1952-41b2-af44-d16a3232bb3f.filesusr.com/ugd/c19c34_c07b659cc85641e5aa0cad0e8dfe1382.pdf?index=true
    • http://kewetanetoza.atwebpages.com/mobitopidasegevuretebepo.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_off0000ef95.bin
483460d8582b4dca5089303fc5266e30ce7be0791f3ce90f7a3fc1c28bad50bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF95 5200 bytes
font_01_sfnt_off00010143.bin
44a8644e31019fbbfe565c163c78d05a8f559cb44e5f4465ce30d90acfe02aca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10143 10664 bytes

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