Malicious PDF — malware analysis report

Static analysis result for SHA-256 e280055eec90f549…

MALICIOUS

PDF

78.0 KB Created: 2021-03-29 01:55:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8694b27fe067ebf66b6e69ec9e9720de SHA-1: 8e4bc5efbde5ea3e1345684b52e56ab562a5f799 SHA-256: e280055eec90f5494206cddbfd505695b03e73c86ee193e2a3b609fd72f91418
134 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains references to 'Elwood staffing timesheet login', suggesting a phishing lure. The presence of numerous external URLs, many hosted on disposable domains, further supports a phishing or credential harvesting campaign. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=elwood+staffing+timesheet+login
    • https://sabidodavo.weebly.com/uploads/1/3/1/4/131408103/1e46496a29.pdf
    • https://dewubixire.weebly.com/uploads/1/3/1/3/131398231/naguvaz_fizoxunup.pdf
    • https://dobopekajami.weebly.com/uploads/1/3/4/3/134314215/597210.pdf
    • https://wuxotiwor.weebly.com/uploads/1/3/4/3/134335057/sonujunasaviwibire.pdf
    • https://disebaxixifos.weebly.com/uploads/1/3/4/7/134714932/powivelapu_denos_karivi_sodojejegale.pdf
    • https://zofoxutugutijor.weebly.com/uploads/1/3/0/8/130874595/vetuxaxij_nonasanavum_saxixebapowen.pdf
    • http://kunepuvobimamin.medianewsonline.com/android_apps_best_reader_reddit.pdf
    • http://topukovatawosu.sportsontheweb.net/how_are_boy_scout_ranks_earned.pdf
    • https://vegipojefatelon.weebly.com/uploads/1/3/4/8/134876486/9d1969eb0.pdf
    • http://kazimibi.getenjoyment.net/basic_excel_exercises_for_students.pdf
    • https://lubafotet.weebly.com/uploads/1/3/1/3/131380208/dupobilejax.pdf
    • https://budamasut.weebly.com/uploads/1/3/4/9/134903336/862427.pdf
    • http://zolepop.mypressonline.com/88367860776.pdf
    • https://www.elwoodstaffing.com/timesheet/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0e0f308d-d594-4db9-87b0-bbb11ae42ec1/xbox_one_controller_wired_pc.pdf
    • https://s3.amazonaws.com/ditiruz/54573795421.pdf
    • https://s3.amazonaws.com/vibasujefir/dell_optiplex_7010_network_drivers_for_windows_10_64_bit.pdf
    • https://s3.amazonaws.com/wenobagupexekap/sony_xplod_500w_4_channel_amp.pdf
    • https://uploads.strikinglycdn.com/files/1bcdf6f2-dd59-45d6-869a-4c47c9e7ba6d/sibiwavuweditiwiwafiziwe.pdf
    • http://zutaturusix.myartsonline.com/tamil_language_learning_free_download.pdf
    • https://s3.amazonaws.com/xijilesuzuxo/mewidumimenutuxowitofulit.pdf
    • https://s3.amazonaws.com/zupenafud/rurixomini.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_off0000f2c0.bin
b9bd26f0d273c7b707ad3c590ec255fe05d09b05f3881bdb825ce6b25851359e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C0 5272 bytes
font_01_sfnt_off000104a7.bin
06d36bf47a908f83e240119aa53f46bb909b2aaa8a331f82bab07ab564ecf0b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104A7 11212 bytes

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