PDF malware analysis — malicious · ae681dc5f02864cc

MALICIOUS

PDF

79.2 KB Created: 2021-03-18 09:55:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 6df8bb6e03bdfa7ddea622ce403fef64 SHA-1: ee1b54292ee214b37e03fd2cf590c0be6bb18c4e SHA-256: ae681dc5f02864cc45c237782685442854ff63405b0fda3b97e483e84337434a

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 phishing or trojan payload. It contains an embedded URL that, when visited, likely leads to the execution of a malicious script or download of further malware. The document body, though heavily obfuscated, suggests a lure related to an 'answer key', aligning with common phishing tactics.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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://zajinet.ru/wix?keyword=the+mendeleev+lab+of+1869+answer+key
- https://cdn.sqhk.co/vuritukupus/OAVBGgj/dupli_color_matching_guide.pdf
- https://cdn.sqhk.co/wofunukasu/bhfgeNg/frankenstein_meets_the_wolfman_cast.pdf
- https://cdn.sqhk.co/jevamivuvugi/hfhfhe3/xaxipiliwezilurerakuxawun.pdf
- https://cdn.sqhk.co/tuseliwi/hcygigL/brake_dies_for_sale.pdf
- http://vimoroketoburiv.22web.org/lamitejobebivilakukozej.pdf
- http://nopopoxozexa.iblogger.org/water_pollution_for_school_project.pdf
- https://cdn.sqhk.co/kinemefuwa/hfgchgH/nasoge.pdf
- http://epipog.com/505781773169zukq.pdf
- https://cdn.sqhk.co/javeduner/7ihYgdw/91200024842.pdf
- http://kinorio5.xyz/pci_syllabus_b._pharmacy_2018-_19jxd9m.pdf
- http://alphabitx.com/weekly_calendar_schedule_template_freeyulbd.pdf
- http://pexovowa.iblogger.org/nipofatudubemo.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://dodadaxijer.epizy.com/10441830445.pdf
- http://dupudenagebokez.rf.gd/little_red_riding_hood_book.pdf
- http://fotenataxiw.rf.gd/ruturejefo.pdf
- http://sabozet.epizy.com/app_lock_fingerprint_free.pdf
- http://zepukedosapiw.rf.gd/behaviour_management_strategies.pdf
- http://mafidaxebodabe.rf.gd/kenmore_model_253_parts.pdf
- http://rajokonola.epizy.com/82508607671.pdf
- http://pugagewuda.rf.gd/69254733873.pdf
- http://migegifixabo.rf.gd/botulismo_pediatria.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_off0000ec99.bin` `9e6012a06a084f1e6ea83ace153dbab38d2faf122512c02901538ca496818d1e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC99	6108 bytes
`font_01_sfnt_off0001014d.bin` `5f3c2f2e6c4fdbfe663d6d4a6d498c4bce30bbae5139d6efd2090bb80491a801`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1014D	13792 bytes

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