Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f162477a37ca084…

MALICIOUS

PDF

88.6 KB Created: 2021-03-20 07:53:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f30712fd8bbe8f4ebb7816b06f80279 SHA-1: 8afd4ab5516837e025c2262d533dc15c8aff5125 SHA-256: 8f162477a37ca084b4a71f43612a9b1e77a04d4b1c5ad554905d770b5ffdcbb9
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a domain associated with malicious activity. The document body, though heavily obfuscated, suggests a lure related to an authorization form, aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/award?keyword=careplus+authorization+form+pdf
    • https://cdn.sqhk.co/litigoruf/wghicif/rise_of_kingdoms_lost_crusade_apk_android_1.pdf
    • http://gidilixad.66ghz.com/55496120465.pdf
    • https://cdn.sqhk.co/govizanorev/wiahehh/28331592781.pdf
    • http://gokojemisivuf.22web.org/boyle_s_law_worksheet.pdf
    • http://wofijolusiga.iblogger.org/96705993742.pdf
    • https://cdn-cms.f-static.net/uploads/4385635/normal_600a19f497f74.pdf
    • https://cdn-cms.f-static.net/uploads/4459791/normal_6054899a13b7d.pdf
    • https://cdn.sqhk.co/zabitokepum/hgjcggL/93716653604.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kazaxese.epizy.com/2007_yamaha_v_star_1100_owners_manual.pdf
    • http://zisafaziga.epizy.com/ambaji_ka_garba.pdf
    • https://s3.amazonaws.com/sutawowirosuvuv/does_universal_remote_work_on_toshiba_tv.pdf
    • http://xigesema.epizy.com/python_format_list_of_integers.pdf
    • http://gezuvemun.rf.gd/56495561353.pdf
    • http://xerozodofuvu.epizy.com/82470443048.pdf
    • http://vanepozimor.rf.gd/kannada_sad_feeling_songs_free.pdf
    • https://s3.amazonaws.com/gavobawum/sinuzazanigezow.pdf
    • http://fikexole.rf.gd/82144496520.pdf
    • http://gupexofuvesok.epizy.com/electrochemistry_problems_worksheet.pdf
    • https://s3.amazonaws.com/jedadokuti/prefix_root_suffix_list.pdf
    • http://nanisoz.epizy.com/saxumirenuwosamodekinafuw.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001041a.bin
96332bf2d9bf8a00b1d696f2f59bb49e420e5d90b85ac1108588ac5c0de7d474
pdf-font-stream PDF embedded font (sfnt) at offset 0x1041A 5236 bytes
font_01_sfnt_off000115c2.bin
f9e67bed58efba8818a269909b6257f5f7effb6672f36cc374a0d8e7df3c02dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x115C2 11868 bytes
font_02_sfnt_off00013e39.bin
5bfda07072dd2e1b0df7f1680a75ba616774ec51e1a09c257f000ba239241e1c
pdf-font-stream PDF embedded font (sfnt) at offset 0x13E39 16140 bytes