Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cfe3992f3294912…

MALICIOUS

PDF

94.8 KB Created: 2021-03-23 17:21:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ce55f3c0554e8f6f7f1c0357991f38d SHA-1: 71809b50305519a60ba4db508434746abd0c6f62 SHA-256: 5cfe3992f3294912acd5670f19e84db92822570969b00243283070c047cfc79a
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. ClamAV also detected it as a phishing trojan. The document body, though heavily obfuscated, appears to contain text related to car reviews, suggesting a social engineering lure to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • 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://nipisod.ru/strik?utm_term=is+2009+pt+cruiser+a+good+car
    • http://tixshopclub.fun/xonakoxupixuk563ac.pdf
    • http://labebatazavanoz.mygamesonline.org/adjetivos_irregulares_en_ingles.pdf
    • https://cdn.sqhk.co/nuzitomizaj/ihidyih/amc_304_engine_diagram.pdf
    • http://xawegap.mywebcommunity.org/how_to_become_a_good_husband.pdf
    • https://cdn.sqhk.co/madumubo/dAWqgdI/bingo_nursery_rhyme_super_simple_songs.pdf
    • https://cdn.sqhk.co/teposodigar/ajjhaAY/cash_app_money_flip_2020.pdf
    • http://all-host.site/bebukimejegibegasopazofoceamn.pdf
    • https://cdn.sqhk.co/jiguluzufuwa/Rcic1Pn/damevazoxijujobugu.pdf
    • https://cdn.sqhk.co/kokademesuz/chehdhh/rental_bond_board_application_form_nsw.pdf
    • https://cdn.sqhk.co/mamevugixej/jgHgghb/stick_warriors_super_battle_war_fight_hack.pdf
    • http://uanews.website/zubalabasawipoluum5a.pdf
    • http://xuxikanewojolaj.22web.org/python_tutorial_for_beginners_2020.pdf
    • http://pidopefajo.22web.org/little_house_on_the_prairie_season_2_episode_8_dailymotion.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://pinogizege.rf.gd/be_safe_online_information.pdf
    • https://uploads.strikinglycdn.com/files/064bea7a-8dc0-4fc8-bc34-88df3db300f7/lomuleximegan.pdf
    • https://uploads.strikinglycdn.com/files/78313661-afe9-4680-91cf-bbc94bf592ad/bewejanilavi.pdf
    • https://uploads.strikinglycdn.com/files/e1b10dba-f6ca-49ac-ac29-9a1dd43004f6/30764480131.pdf
    • https://uploads.strikinglycdn.com/files/d9bab4fd-b0ab-44fe-bed3-919c17b38ec3/doripu.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea33.bin
ffeb89eaad713c9717385028f79c9757067aafb2c2382ea8cbab0e6efe35a425		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA33 6744 bytes
font_01_sfnt_off0000fb1b.bin
b66553588c04f914ced5de075861db9563df234796037052bae4d648e2e84535		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1B 5352 bytes
font_02_sfnt_off00010d4c.bin
f8deea505dd891e600b1ae7be1bc3a3c27c830d5d09bdcf4b031c660006d5e61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D4C 7028 bytes
font_03_sfnt_off00012370.bin
bf3c798140b82e33766547a467a9b7aa566a9c23b1a9e4964566dd36b9b6dc33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12370 11092 bytes
font_04_sfnt_off0001499c.bin
8c1e3298cb301b6aa2c2aeff0a89e1cafee6626e56d5ffa98ad52a7598c40df9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1499C 16168 bytes
font_05_sfnt_off00015ea1.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15EA1 4324 bytes

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