Malicious PDF — malware analysis report

Static analysis result for SHA-256 b47c3acf131d6285…

MALICIOUS

PDF

73.4 KB Created: 2021-03-16 16:07:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4fac5a596e8289da0731a05248967f2 SHA-1: d6e8315fc44371b86539dcbefddd2b9e591cc18c SHA-256: b47c3acf131d62853a2b739d50a72c1b78b276b6ca41d943ec626d3b808f7246
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. It contains an external URI pointing to 'mezovuduw.ru', which is presented as a '7th grade math quiz pdf'. This suggests a phishing or social engineering lure. No scripts were extracted, but the PDF structure itself facilitated the embedding of the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://mezovuduw.ru/123?utm_term=7th+grade+math+quiz+pdf
    • https://static.s123-cdn-static.com/uploads/4379229/normal_5ff27d4ef332d.pdf
    • https://static.s123-cdn-static.com/uploads/4485810/normal_5fe308c75d22f.pdf
    • https://static.s123-cdn-static.com/uploads/4454429/normal_5ff4fb3aca52c.pdf
    • http://fupemagis.mywebcommunity.org/40592253800.pdf
    • http://finipupote.mywebcommunity.org/lapepiki.pdf
    • http://ladebizelase.scienceontheweb.net/60357593544.pdf
    • http://rasudilikid.mywebcommunity.org/wexevim.pdf
    • https://static.s123-cdn-static.com/uploads/4416125/normal_60032324aafee.pdf
    • http://pirewarekow.mywebcommunity.org/vawonofovozunagogexowaza.pdf
    • http://fibisazorowax.mypressonline.com/58630206063.pdf
    • http://delinapod.mypressonline.com/healthrider_h90t_treadmill_review.pdf
    • http://lagepukoz.22web.org/873581769.pdf
    • https://cdn-cms.f-static.net/uploads/4416653/normal_6029f999b37c5.pdf
    • https://cdn-cms.f-static.net/uploads/4405208/normal_604825ce502d5.pdf
    • https://static.s123-cdn-static.com/uploads/4476421/normal_60041e16c064a.pdf
    • http://miribut.mywebcommunity.org/pabomu.pdf
    • http://palubofapejuraw.mywebcommunity.org/xomaraxurat.pdf
    • https://static.s123-cdn-static.com/uploads/4424364/normal_5fed39d160dc6.pdf
    • https://cdn-cms.f-static.net/uploads/4471723/normal_6014aab0a30dc.pdf
    • http://kurametugugu.mygamesonline.org/poulan_pro_leaf_blower_replacement_parts.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://luvetux.myartsonline.com/tener_la_autoestima_alta.pdf
    • http://vuruwabudakase.epizy.com/iso_27032_cyber_security_free.pdf
    • http://ligoroxenafof.atwebpages.com/89770962281.pdf
    • http://bapibalapu.rf.gd/jezodetawemexunimebazi.pdf
    • http://wokarodefi.onlinewebshop.net/43665743445.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_off0000e03a.bin
df3a70225f76b88bd966e18292b08601ce07a572807f35308bb1afea2d617361
pdf-font-stream PDF embedded font (sfnt) at offset 0xE03A 5408 bytes
font_01_sfnt_off0000f278.bin
7373fe24ac652692f502160c26931d1d7c506b15e056c3851fb774555ad8b459
pdf-font-stream PDF embedded font (sfnt) at offset 0xF278 11028 bytes