PDF malware analysis — malicious · 04b1e43cf3baa4d8

MALICIOUS

PDF

76.1 KB Created: 2021-03-01 20:11:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 2a1f88054c182630ce3822eedc0ebd3e SHA-1: ed0f60bad699cfa737b6d2573dc67986704f30ea SHA-256: 04b1e43cf3baa4d80ff7b58630ca416da0031b1869700931c6c8bb34e107c826

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL, disguised as search results, is the primary indicator of a phishing or social engineering attack. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create 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://resalured.ru/123?utm_term=river+flows+in+you+piano+chords+letters
- http://drawer.icu/feud_definition_in_spanishvirct.pdf
- http://robugipunebib.mygamesonline.org/what_is_the_meaning_of_boolean_expression.pdf
- http://sufulilutidake.mypressonline.com/86006685465.pdf
- http://vykupavto54.ru/dofuninazokejudesegived7mtch.pdf
- https://cdn-cms.f-static.net/uploads/4452853/normal_5fd7d95b9e2d3.pdf
- http://tublitalia.fun/geography_quiz_questions_and_answers_hard0um7i.pdf
- https://cdn-cms.f-static.net/uploads/4495264/normal_6035d38161a6c.pdf
- https://cdn-cms.f-static.net/uploads/4417834/normal_5fd1d57ca3467.pdf
- http://zekojotewakugag.mypressonline.com/what_does_political_cartoon_mean.pdf
- http://tosefabebiribow.scienceontheweb.net/vajeburagadimenu.pdf
- http://jorowijedo.mywebcommunity.org/how_can_i_speak_simple_english_in_daily_life.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://zubiluwetij.myartsonline.com/worudopawap.pdf
- http://lenadupubop.rf.gd/wegikewojonisopuzirelu.pdf
- http://kavibajegis.onlinewebshop.net/the_logician_personality_type.pdf
- http://fokuxukidedir.rf.gd/wugibipab.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
- http://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d68a.bin` `395a4c350bb4bdf21e21a1b7d535f6ec51503ed5bd418e306b155d32354fef0a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD68A	5504 bytes
`font_01_sfnt_off0000e95e.bin` `fdd1c9363c137008595500b1436c6bbb0f06e9ac9c8544ae9a669d555dd78728`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE95E	10712 bytes
`font_02_sfnt_off00010e12.bin` `f77402631810fda667343bf6e8a088b3efe542fbcc28fdc2c15c989232318ea9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E12	16172 bytes

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