Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3a95c0df36c94fe…

MALICIOUS

PDF

89.7 KB Created: 2021-03-13 17:38:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: abafe530477f0efdfb0e9c2e023f55c9 SHA-1: 209a5ef81efd0b96a1f4a3257b2789fe7023f87e SHA-256: d3a95c0df36c94fe3a2b072bd6abb1105bfa25760a5eb00299e43f8374883169
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spamming operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were extracted, the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://fokemale.ru/wix?keyword=spotify+mod+premium+apk+terbaru PDF link annotation
    • https://gokejubekilebu.weebly.com/uploads/1/3/4/3/134376129/luximazemev_nibanewabopafo.pdfIn PDF document text
    • https://nepokotivo.weebly.com/uploads/1/3/2/8/132814168/fetumosobegewu_pomag.pdfIn PDF document text
    • https://besunuvoduzusub.weebly.com/uploads/1/3/4/2/134266379/573d5c702ac.pdfIn PDF document text
    • https://jurulekoteg.weebly.com/uploads/1/3/4/7/134700509/3917692.pdfIn PDF document text
    • https://mowofagafuvu.weebly.com/uploads/1/3/4/5/134594922/bb810418dbde0.pdfIn PDF document text
    • https://tajuweselu.weebly.com/uploads/1/3/4/3/134362517/dipizatezebasaziw.pdfIn PDF document text
    • https://xabolagusi.weebly.com/uploads/1/3/4/6/134631680/jutoniwoke.pdfIn PDF document text
    • https://xosofanukofupa.weebly.com/uploads/1/3/4/8/134879033/fugenal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xafinoligu.epizy.com/administrao_da_produo_2_edio.pdfIn PDF document text
    • http://zonuwugi.rf.gd/espresso_english_grammar_level_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/372eb248-44fa-4169-8e7b-10f5453ea178/fomulafadimixamizovipime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c3a60c5-2b52-4bac-ac92-4f4b949c786c/best_3d_animation_software_free_download_for_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/mixanaz/41206496789.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaaf44c8-0cff-4cd4-9d9f-cae9391e89bd/manhattan_gre_500_essential_words_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be77c6d7-ae32-4aaa-be2b-865fdb60f441/twilight_part_2_full_movie_in_hindi_download_480p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f848c73e-0ec2-4162-b2d0-b9e2b3c3eefa/jack_reacher_movie_watch_online_free_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4884769-a061-4ee5-acfd-da3bf5e75476/android_development_tools_eclipse_plugin_download.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/kiliv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adb6e10a-5389-47a9-9fa7-6d09f472eda5/how_much_is_1095_steel.pdfIn PDF document text
    • http://lefutakogojabi.rf.gd/wijazof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc40500c-40d9-4e85-8726-593a48915abd/xatelurupokekufekaga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f6b50f2-e376-470b-af86-ac7ad921dfe0/how_do_you_fix_a_honeywell_thermostat.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000109e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E5 5384 bytes
SHA-256: cd5f76365ab1991bdd68f69839bbc4265efea1dfa2c0811b9bbfa71c2f7e2bfb
font_01_sfnt_off00011c2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C2A 11660 bytes
SHA-256: bbb33289bdf262d58f7306c4f60f8af828afd43e37165072ac7f9cf7fbbbe0bd
font_02_sfnt_off00014323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14323 16312 bytes
SHA-256: bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939