Malicious PDF — malware analysis report

Static analysis result for SHA-256 1494de99653dec0c…

MALICIOUS

PDF

73.8 KB Created: 2021-04-02 11:22:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1dc30f3860fb63b590cd54df7f87580a SHA-1: 7e32109a31bfa914a53ab3187cabdb6087b0f583 SHA-256: 1494de99653dec0c412c4cd73255d6fa78ebb4487e82a777dae827e2e6e5f379
96 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'Palavras cruzadas' (crossword puzzles). The presence of external URIs indicates an attempt to redirect the user to a potentially malicious site for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/award?keyword=palavras+cruzadas+coquetel+nivel+medio+pdf
    • https://cdn-cms.f-static.net/uploads/4459035/normal_603314a049380.pdf
    • https://cdn.sqhk.co/jadepibake/2jtlTkb/ncis_new_orleans_season_6.pdf
    • https://cdn-cms.f-static.net/uploads/4426408/normal_6056f79750e5d.pdf
    • http://xomutukegadoj.mypressonline.com/how_long_does_it_take_for_evening_primrose_oil_to_work_for_breast_pain.pdf
    • https://cdn.sqhk.co/tejilunuf/sgiKdif/71241907932.pdf
    • https://static.s123-cdn-static.com/uploads/4462681/normal_5ff08fcd3ce74.pdf
    • https://cdn-cms.f-static.net/uploads/4408460/normal_60386def7ae90.pdf
    • https://static.s123-cdn-static.com/uploads/4369781/normal_5fe447755e739.pdf
    • https://cdn.sqhk.co/pofoxubo/n0ibhdJ/unlimited_money_racing_games.pdf
    • http://makelemeg.mygamesonline.org/8165773860.pdf
    • https://cdn.sqhk.co/jifigetuxu/fMgfh6r/76760421710.pdf
    • https://cdn-cms.f-static.net/uploads/4407991/normal_601e2b757fe1c.pdf
    • http://nopuvobetag.mygamesonline.org/bullish_and_bearish_divergence.pdf
    • https://cdn-cms.f-static.net/uploads/4484994/normal_604b34c69b8dd.pdf
    • http://kamefutebiwef.mywebcommunity.org/25153543899.pdf
    • http://bobujopolodusol.mygamesonline.org/the_storyteller_s_secret_carmine_gallo.pdf
    • http://lebedugipul.mywebcommunity.org/talogesexirumarewemov.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gajopule.myartsonline.com/constructing_dilations_worksheet.pdf
    • http://ranitirunom.myartsonline.com/lord_of_the_rings_piano_guys_sheet_music.pdf
    • http://napamewa.atwebpages.com/metaphysical_bible_dictionary_online.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_off0000e211.bin
e75a47eb43e63312491ed2e3db0378c25d3fd189b2329359de055815d0cb76a8
pdf-font-stream PDF embedded font (sfnt) at offset 0xE211 5540 bytes
font_01_sfnt_off0000f4e3.bin
1316f9f75a7266d62adbc02a98099d5474a6671a2f3745198718d42cc48f5995
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E3 11348 bytes