Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b728d0ef90d8b25…

MALICIOUS

PDF

78.6 KB Created: 2021-04-18 07:07:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6d369b85c474b72c88b3e98e707b25f SHA-1: 2d0b14044bc34c51fd117de14f7f3167197f518c SHA-256: 6b728d0ef90d8b25177c418d46f769537a899ecc1e7462c13d20a84979ca7da1
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that points to a suspicious domain, identified by heuristics as an external URI and an embedded URL. ClamAV detection and ML classification strongly indicate maliciousness, classifying it as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, suggests a lure related to 'Way of the four elements 5e', likely a game or role-playing guide, to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://resalured.ru/strik?utm_term=way+of+the+four+elements+5e
    • https://static.s123-cdn-static.com/uploads/4390052/normal_5fc90e975a8ab.pdf
    • http://juwapes.22web.org/pumped_up_kicks_tab.pdf
    • http://nakotigolajeg.scienceontheweb.net/pafiwukotazagawagusasatox.pdf
    • http://zotikarida.medianewsonline.com/93807273456.pdf
    • https://cdn.sqhk.co/gibuzini/PibgJha/78543148845.pdf
    • https://cdn.sqhk.co/subilikiwi/jcjjmh1/-_34-_85.pdf
    • http://lonemap.medianewsonline.com/12503760430.pdf
    • https://cdn-cms.f-static.net/uploads/4372072/normal_5fdbe979a2a34.pdf
    • http://fiwisud.getenjoyment.net/big_little_lies_season_2_episode_5_review.pdf
    • http://xivobivivupe.mygamesonline.org/area_of_a_triangle_worksheet_7th_grade.pdf
    • http://zabemaladameg.medianewsonline.com/67720576301.pdf
    • https://cdn.sqhk.co/xedufoga/kXgcXjb/tsuki_adventure_yukiyama_diary.pdf
    • https://cdn-cms.f-static.net/uploads/4406501/normal_605c87ec4056a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zolerazowubow/92817392577.pdf
    • http://xamukipadu.myartsonline.com/35502442416.pdf
    • http://muxovunibo.epizy.com/cmo_se_calcula_la_normalidad_de_una_solucin.pdf
    • https://s3.amazonaws.com/wupuxus/panasonic_telephone_manual_dect_6.0_plus.pdf
    • https://s3.amazonaws.com/rizoli/final_fantasy_8_game_walkthrough.pdf
    • http://garopawugalil.rf.gd/68773669994.pdf
    • https://s3.amazonaws.com/satudifin/75794840483.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_off0000f43b.bin
b0c1d16a79675b5fcbbd09133b071cb4b233329d8c2491b2e3e5256cfb8df922
pdf-font-stream PDF embedded font (sfnt) at offset 0xF43B 5244 bytes
font_01_sfnt_off000105ff.bin
b7b66d4235d47722370fc1ae718e65e9413a200e2c7e1a0d50d926c31827c7ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x105FF 12352 bytes