Malicious PDF — malware analysis report

Static analysis result for SHA-256 8346a2260112319a…

MALICIOUS

PDF

72.9 KB Created: 2021-03-25 07:27:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb4d13e3e95bff30d116dad1306e6ee3 SHA-1: 4a8ac749f1dfd8e9d885f3e4c7d69acf86cc94ce SHA-256: 8346a2260112319a4fe933264c51e61354cd477e640056660b8ce295fa235149
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains an embedded URI pointing to a suspicious domain, which is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to "cyber security analyst interview questions pdf". No scripts were extracted, but the presence of external URLs and the overall detection suggest a phishing or malware distribution attempt.

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://gimoguvi.ru/award?keyword=cyber+security+analyst+interview+questions+pdf
    • https://cdn.sqhk.co/kubarevopew/ijsjid2/papanimizupimoruwoviro.pdf
    • https://cdn.sqhk.co/wevexifimur/ieigXVv/kamikamewubobutikojix.pdf
    • https://cdn-cms.f-static.net/uploads/4454045/normal_6023c0193d589.pdf
    • https://cdn-cms.f-static.net/uploads/4421959/normal_6048318474154.pdf
    • https://cdn.sqhk.co/kidimezamos/hijdhbN/61449031966.pdf
    • https://cdn.sqhk.co/nusideja/ehgticr/bogewidozomawusifap.pdf
    • http://gozatelaji.22web.org/thala_ajith_photos_tamil.pdf
    • https://cdn.sqhk.co/toromerepowa/hjhUXeg/46895889735.pdf
    • http://vawuzusodiguse.iblogger.org/favusotogekulejimesikotad.pdf
    • https://cdn.sqhk.co/natokaze/ejiighb/21432370472.pdf
    • https://cdn-cms.f-static.net/uploads/4409102/normal_603579c64168f.pdf
    • http://watutuwox.iblogger.org/nogusifapogobobave.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wulotugadag/how_to_use_a_watch_winder.pdf
    • https://s3.amazonaws.com/sogovekevi/fadugedafabuwuweroden.pdf
    • https://s3.amazonaws.com/jokotaziweluge/singh_is_king_picture.pdf
    • https://s3.amazonaws.com/fuwuzerijofa/singer_simple_3223g_semi-automatic_sewing_machine.pdf
    • http://zibakogemigana.rf.gd/tibesaxavimiz.pdf
    • https://s3.amazonaws.com/rokuwapesu/nugapitiwibejobibifubupi.pdf
    • https://s3.amazonaws.com/bejikefowu/personality_types_in_the_workplace.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_off0000e00a.bin
b466e3109166d36f6f157a54fb3c742f04c3b0b39c2f08de2cbee71814b8e85f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE00A 5576 bytes
font_01_sfnt_off0000f324.bin
cd68f360d418d0e7e9901f5de54ac174b1b7517cbf1f0eb7f07ea8838833e197
pdf-font-stream PDF embedded font (sfnt) at offset 0xF324 10412 bytes