Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f100873b0a26383…

MALICIOUS

PDF

73.9 KB Created: 2021-04-02 12:05:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 827fe9cf1412fe2bbb3b31d7eedf3411 SHA-1: dab6ae6e24aa988d1bf10bc7d9650f7e412ae074 SHA-256: 4f100873b0a263830ba47236443f11a506cb4726c012fb67f20c5d468c547a2d
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL pointing to a suspicious domain. ClamAV and ML classifiers flagged this file as malicious, specifically as a phishing trojan. The presence of an external URI suggests an attempt to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

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://xezojetit.ru/wix?keyword=pltw+poe+marble+sorter
    • http://aicberg.net/billetera_movil_banpro_bloqueadasi5vh.pdf
    • http://zhenskiizhurnal.ru/left_hand_path_bar5w7vz.pdf
    • https://cdn-cms.f-static.net/uploads/4447912/normal_5fd9c01d20cd6.pdf
    • https://cdn-cms.f-static.net/uploads/4378855/normal_602d94a6d0e1d.pdf
    • https://static.s123-cdn-static.com/uploads/4411915/normal_5fe0f1eeb983f.pdf
    • https://cdn-cms.f-static.net/uploads/4530578/normal_6029784b6d5ee.pdf
    • http://moneyindia.site/ibps_clerk_pre_puzzler9and.pdf
    • https://static.s123-cdn-static.com/uploads/4410674/normal_5febcf7d8091a.pdf
    • http://24goodstore.site/56614858930f55bg.pdf
    • http://fakaripeti.xyz/8912955095nlomk.pdf
    • http://teksalon.xyz/jedafqfmu0.pdf
    • http://mavafesumej.medianewsonline.com/84272994265.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/sowirutelevolur/is_samsung_ultra_worth_it.pdf
    • http://rabatelekovufar.myartsonline.com/la_catedral_del_mar_barcelona_como_llegar.pdf
    • https://s3.amazonaws.com/gajakelegeza/gta_5_online_money_cheat_pc_2020.pdf
    • https://4d75d3c9-3a4d-4df6-84ab-e48b83d723e5.filesusr.com/ugd/cdb50c_3838bb3bd3ba43f392579fbe69519423.pdf?index=true
    • https://1ffb5d6c-d890-49e0-9b87-dc10fbfa49e2.filesusr.com/ugd/8bc2a6_b50d5593b48440209fe55ab3e32c102e.pdf?index=true
    • https://b2f3f1fb-4f3f-4d5d-be65-f5b10dce6288.filesusr.com/ugd/735189_d5afea6bffd24b2eaa89bab24ea57218.pdf?index=true
    • https://s3.amazonaws.com/luropi/17153871174.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5e1.bin
3231d72ffa6c0112f4912ff536871356b7eb587d809be92754ed86419ecb421f
pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E1 4832 bytes
font_01_sfnt_off0000e647.bin
bd728401f2e178a2cef2cdf7850a40d4adc8cce202286b4091089e4b0fa57a36
pdf-font-stream PDF embedded font (sfnt) at offset 0xE647 11292 bytes
font_02_sfnt_off00010cbb.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBB 4324 bytes