Malicious PDF — malware analysis report

Static analysis result for SHA-256 d16d942b06d42638…

MALICIOUS

PDF

80.1 KB Created: 2021-03-16 10:56:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a34c3aaa343b81b04df12203f3ef43b SHA-1: 7be39b100ebce540da076d2a994057eb41d77217 SHA-256: d16d942b06d426380cf000aba53b91606e61cee23551e0ecae27285758c4b742
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to educational content, aligning with common social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://druttle.ru/wix?keyword=newton%2527s+first+law+worksheet+high+school
    • https://static.s123-cdn-static.com/uploads/4403276/normal_5fcfe66fbe41f.pdf
    • http://alexsaf.ru/ffiec_call_report_codeswkuoi.pdf
    • http://notdull-eng.online/how_much_does_it_cost_to_run_a_tractor_per_hourvcqq5.pdf
    • https://cdn-cms.f-static.net/uploads/4497109/normal_6019dea33e3af.pdf
    • http://itslm.fun/31057848544jzrg2.pdf
    • https://zobimodajozo.weebly.com/uploads/1/3/4/3/134340865/jewinev.pdf
    • http://homeolimp.com/fallout_1_guidep2yws.pdf
    • https://jiresuzava.weebly.com/uploads/1/3/4/7/134706808/wugigejeladoma.pdf
    • https://siragakepog.weebly.com/uploads/1/3/4/8/134890789/tabejoxelavupanoje.pdf
    • http://jewagep.22web.org/what_is_a_good_wine_pairing_with_lamb_chops.pdf
    • http://top-shop-store.website/xadofobivanzcqk.pdf
    • https://cdn-cms.f-static.net/uploads/4471948/normal_605020dd6c1fd.pdf
    • https://lupawepenotude.weebly.com/uploads/1/3/1/6/131606523/zalokemiri.pdf
    • http://ratugageju.22web.org/how_we_die_book.pdf
    • https://static.s123-cdn-static.com/uploads/4383170/normal_5fcc0136e23ee.pdf
    • http://reduslimitalia.site/98635637218yzvsu.pdf
    • https://babibogek.weebly.com/uploads/1/3/1/3/131379554/dojogamebetijufivuza.pdf
    • http://klokisik.space/what_kind_of_oil_does_a_2015_nissan_pathfinder_use0erfp.pdf
    • http://nickned.me/78622893932l46of.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/palevijuj/pifubagelusim.pdf
    • http://nerokigonone.rf.gd/what_are_the_basic_interview_questions_in_sql.pdf
    • http://zogutofarori.epizy.com/43913739533.pdf
    • https://s3.amazonaws.com/sikuva/8556987080.pdf
    • https://s3.amazonaws.com/womirofop/83691461503.pdf
    • https://s3.amazonaws.com/nitidadufetenu/gavatabo.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_off0000ee0f.bin
da07eae600d72f3df77737b659005199239fe55a581e660e5f0c5218f4701f2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0F 5088 bytes
font_01_sfnt_off0000ff6e.bin
3b92dacd9e761433d2e5b3386588eec90536be16133969c3988b81f878bb5786		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6E 10816 bytes
font_02_sfnt_off00012477.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12477 4324 bytes

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