PDF malware analysis — malicious · 543425f6bcb00677

MALICIOUS

PDF

70.6 KB Created: 2021-03-17 01:39:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b295640f03b91a4c41600f4af0490620 SHA-1: e5402af2b887b3712579a9add40d7fa078265bec SHA-256: 543425f6bcb00677287a0cb9953fadc4a6bfe43701e1596a9fd60625a825b350

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The 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 URL that mimics a search result for educational materials, likely a lure to download further malicious content. The PDF structure itself is also flagged for duplicate object bodies, a common obfuscation technique in malicious PDFs.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 4

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://leonvi.ru/wix?keyword=thomas+calculus+13th+edition+instructor+solutions+manual+pdf
- https://jategolotigani.weebly.com/uploads/1/3/4/8/134882723/476636bbdcd2c1f.pdf
- https://cdn-cms.f-static.net/uploads/4467950/normal_601410aa0d315.pdf
- http://lupokixez.22web.org/78912801780.pdf
- http://kotexob.iblogger.org/mugigevabejusogazuzikagar.pdf
- https://cdn-cms.f-static.net/uploads/4403119/normal_603028fcc7dfe.pdf
- http://gisisavodure.22web.org/bejiliwepujazogonudi.pdf
- https://tariroviwobin.weebly.com/uploads/1/3/4/7/134715354/xewuwazunit_vemonatu.pdf
- http://jurinijija.22web.org/the_economist_style_guide_epub.pdf
- https://wizemeleg.weebly.com/uploads/1/3/4/3/134307012/kukaxupokoda.pdf
- http://tixomuwenape.22web.org/bowafazirijitogiwuxo.pdf
- https://cdn.sqhk.co/jumivosokigo/Bihihhw/thoracic_outlet_syndrome_symptoms_headache.pdf
- https://cdn.sqhk.co/labifikup/kn223gi/free_download_mp3_cutter_for_pc_windows_7.pdf
- https://cdn-cms.f-static.net/uploads/4527859/normal_602864ddad64a.pdf
- http://worameruvejaka.mywebcommunity.org/ziser.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://bezuxij.rf.gd/john_deere_mower_tire_tubes.pdf
- http://sovuberexizizir.epizy.com/misapurofedekise.pdf
- http://guseboses.atwebpages.com/zularawaxagis.pdf
- http://dunupilopun.epizy.com/car_accident_report_template_uk.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d5aa.bin` `3f0693647e3bce356f69139f9bcbd376b2b4868d7b48fad73cf8a1a08d74f064`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD5AA	5560 bytes
`font_01_sfnt_off0000e865.bin` `147a44c688185b98247e2b5d52f60ddfabdca8e0499849c9e3df20d6342e26bf`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE865	10640 bytes

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