Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e761fcb6050373f…

MALICIOUS

PDF

78.2 KB Created: 2021-03-09 08:58:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5bc9fc5adb6cb989c9708075b13ff1a SHA-1: 70a88f1f5b1f4164f2190e61265be3354540c4ce SHA-256: 8e761fcb6050373f023a9260c19e7d279a98698b77d8760b456b83f9d77bff13
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and an ML classifier. The document body, though heavily obfuscated, contains text related to 'count if sql reporting services' and the authoring application 'wkhtmltopdf', suggesting a potential lure. The presence of an external URI indicates an attempt to redirect the user to a malicious site, likely for phishing or to download further payloads.

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/123?utm_term=count+if+sql+reporting+services
    • https://funefazadoma.weebly.com/uploads/1/3/4/6/134648765/8babbde9c.pdf
    • http://bapupozizevose.22web.org/tratamiento_gastritis_erosiva.pdf
    • http://kosolibanun.iblogger.org/countdown_video_template.pdf
    • http://dizaxabon.iblogger.org/mezojezubidunufobafu.pdf
    • https://bujajegufo.weebly.com/uploads/1/3/4/1/134108800/1206515.pdf
    • https://jizenifujepuv.weebly.com/uploads/1/3/4/4/134489688/7236096.pdf
    • https://zotizoju.weebly.com/uploads/1/3/5/3/135349435/4a8589a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zozadugaweguj.epizy.com/annual_report_examples_2018.pdf
    • https://uploads.strikinglycdn.com/files/a9f4066f-88d4-4d8a-aa82-590879467fc0/rosamokiv.pdf
    • https://s3.amazonaws.com/duzexefemosaxe/psp_game_god_of_war_2.pdf
    • http://dizibabazuvuxu.rf.gd/fefezunaputiginopapi.pdf
    • http://vifasuwa.epizy.com/zatarain_cajun_chicken_pasta_cooking_instructions.pdf
    • https://uploads.strikinglycdn.com/files/6ad90465-244b-47d7-a74b-475ba71b2ec9/dominos_garlic_parmesan_white_sauce_ingredients.pdf
    • https://s3.amazonaws.com/jutenojamega/xesajoporo.pdf
    • http://koxosam.rf.gd/putoregusofuxubaz.pdf
    • http://remokulepene.rf.gd/funupis.pdf
    • http://gofosuxubajo.epizy.com/integers_word_problems_worksheets_grade_8.pdf
    • https://uploads.strikinglycdn.com/files/ae878597-d236-472c-9565-59ff2c019788/ms_7641_ver_4.0_motherboard_manual.pdf
    • https://s3.amazonaws.com/mipizaju/un_curso_de_milagros_leccion_161.pdf
    • https://s3.amazonaws.com/minabiwa/what_is_the_difference_between_visible_trade_and_invisible_trade.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_off0000f386.bin
db10694a70909230894026584637a06a1ec2a89f5bb8abfc84f20018bd238850
pdf-font-stream PDF embedded font (sfnt) at offset 0xF386 5064 bytes
font_01_sfnt_off000104e1.bin
f8ab9778e3a18943566d53e443919af1be688472f0dfd33584d940f5b99d76e2
pdf-font-stream PDF embedded font (sfnt) at offset 0x104E1 11200 bytes