Malicious PDF — malware analysis report

Static analysis result for SHA-256 fadb921fe1fee381…

MALICIOUS

PDF

88.0 KB Created: 2021-03-10 02:29:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1645a901e071deeaadd9a4860c86dcbb SHA-1: 9fdd665d6010b4c749bf817cc1a41e0b3f9f1566 SHA-256: fadb921fe1fee381daddf60aeb367d5ac65c572437e775f617d31fcfac619e46
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document body, though heavily obfuscated, contains keywords related to a 'cricket world cup schedule', suggesting a lure. The presence of an external URI pointing to 'midufefew.ru' further supports the phishing pretext, likely leading to a malicious download. No scripts were extracted, but the PDF structure and external link are strong indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://midufefew.ru/award?keyword=cricket+world+cup+2020+schedule+pdf+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370286/normal_5fcb39662e218.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427781/normal_600add5ca5fb4.pdfIn PDF document text
    • http://rivimebowov.22web.org/voot_colours_tv_show.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3e4cd38-233f-4471-9bdf-24809de6277e/95155525969.pdfIn PDF document text
    • http://zudovub.epizy.com/monsters_vs_aliens_president_coffee_button.pdfIn PDF document text
    • http://kunuzozadaza.epizy.com/87514521402.pdfIn PDF document text
    • https://7b806e58-2e0f-4c22-b5e1-e0f71c4d6e86.filesusr.com/ugd/8da65f_83a286c4b5ef4876b820166737bd055e.pdf?index=trueIn PDF document text
    • http://deronug.epizy.com/what_is_magna_in_english.pdfIn PDF document text
    • http://depebovibu.epizy.com/mr_coffee_12_cup_coffee_maker_white.pdfIn PDF document text
    • http://miwofalixi.rf.gd/google_form_theme_templates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ebf4c92-a55c-4ac9-adab-dd257fde2042/97494689518.pdfIn PDF document text
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_46ccdbfa5a504c91ba380015e4f22824.pdf?index=trueIn PDF document text
    • https://ac09d6fb-20d1-47e2-97cb-2568fc137cdf.filesusr.com/ugd/03dcd4_a7e17899544a4839bcb2180c65976da8.pdf?index=trueIn PDF document text
    • https://8c56b32b-3398-45d6-9c0b-b55146621f16.filesusr.com/ugd/6924eb_2f54a667f5dd472186437877d6f2fb83.pdf?index=trueIn PDF document text
    • http://seguwogira.rf.gd/name_ringtone_akash_song.pdfIn PDF document text
    • https://0dd0cd87-80d3-4eb5-b9c6-73c43c3a6fca.filesusr.com/ugd/f0b6b3_2d39dfa63a2e407684da9cbd8bdaa850.pdf?index=trueIn PDF document text
    • http://binisufatifa.epizy.com/triangle_congruence_crossword_answers.pdfIn PDF document text
    • http://fasadokejofis.epizy.com/android_one_xiaomi_mi_8.pdfIn PDF document text
    • https://b0c090b1-cb02-46d8-8a69-3fb9d82636b6.filesusr.com/ugd/4dbf3f_970fa5d98bd041f0a321ebace5497070.pdf?index=trueIn PDF document text
    • https://b03e51a8-7171-48c0-94d6-e4c032e6f37f.filesusr.com/ugd/9421c8_9005ab2a2a90415fab16e1967870e6f5.pdf?index=trueIn PDF document text
    • https://f815f12b-539f-4060-8ed9-abd2caada31b.filesusr.com/ugd/ceb2e8_d0154efa59ad4b7e837fc401078ccfa6.pdf?index=trueIn 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_off000104a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A6 5580 bytes
SHA-256: 8c6286ebdb344022799759a36d0be71ffa58efdf9f34129813c29d7275d136b6
font_01_sfnt_off000117b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B2 10640 bytes
SHA-256: 4324c1c4e90c45373fdd7732b84a873cd3a2b94de35e788af9e04a7e16f93f3a
font_02_sfnt_off00013c5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C5D 16164 bytes
SHA-256: e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6