Malicious PDF — malware analysis report

Static analysis result for SHA-256 330896e5a59147f6…

MALICIOUS

PDF

83.8 KB Created: 2021-04-04 04:55:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd45853146cc000b0db73f3e74b8bed3 SHA-1: 2bf1f59f6ecdae29295bb94dcd99437bb868329c SHA-256: 330896e5a59147f669f4d7820f7f8ed02709422dbf8fe1bda75e598fdee852f4
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The sample is a PDF document flagged by ClamAV as a phishing trojan. Heuristics indicate it uses an advance-fee scam lure, suggesting a phishing or fraud attempt. The embedded URL `https://zajinet.ru/wix?keyword=when+will+irs+release+refunds+2020` is likely the primary vector for the attack, aiming to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://zajinet.ru/wix?keyword=when+will+irs+release+refunds+2020
    • https://rubosesizip.weebly.com/uploads/1/3/4/7/134744628/fuzowigixuz.pdf
    • http://spiritstudio.ru/how_do_i_find_my_hotspot_network_security_keyd2wqz.pdf
    • http://getchambre.xyz/dewonoxivexibukejipibu6s4po.pdf
    • https://cdn-cms.f-static.net/uploads/4506159/normal_604f90f8a5006.pdf
    • http://venira.su/tiwobopatapejugeryg99y.pdf
    • http://boevoenlp.com/noxotedibusogtz2z9.pdf
    • https://static.s123-cdn-static.com/uploads/4416675/normal_5fe08ecaa855f.pdf
    • http://pubgucbayim.com/wamapefezuxosufx2i68.pdf
    • http://meetsoda.club/50164799417w8cs7.pdf
    • http://dakajak.medianewsonline.com/principles_of_ophthalmic_lenses.pdf
    • http://tinubawolu.mywebcommunity.org/web_to_firefox_plugin.pdf
    • http://grandov.pro/dnd_5e_werewolf_lycanthropycge48.pdf
    • https://static.s123-cdn-static.com/uploads/4484807/normal_5fe1c1d255981.pdf
    • http://fafesixokegigi.getenjoyment.net/34218286112.pdf
    • https://cdn-cms.f-static.net/uploads/4369313/normal_605a70eb4d71c.pdf
    • https://xefobizedep.weebly.com/uploads/1/3/1/6/131636625/5047553.pdf
    • https://static.s123-cdn-static.com/uploads/4484812/normal_5ff65d61732a0.pdf
    • https://gagivoxiw.weebly.com/uploads/1/3/5/9/135991060/7548685.pdf
    • http://juzufezike.mygamesonline.org/case_studies_in_abnormal_psychology_10th_edition.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lezerawe/gasubiwikelobibetox.pdf
    • https://s3.amazonaws.com/rudelazifizuvo/repetitious_information_definition.pdf
    • https://s3.amazonaws.com/vidadaviwal/63930890814.pdf
    • https://s3.amazonaws.com/xixonu/bahubali_1_video_movie.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_off000105e3.bin
de55fe2e86eccc8e4cb550791836676a81b77870a9c06ff8503edfe74e190058		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105E3 5376 bytes
font_01_sfnt_off0001183b.bin
e3dbe74d4afc3e2f7b3d9703469af5b441e8809c5a17b970230528719ac73c78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1183B 11808 bytes

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