Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbbfee3095b6648b…

MALICIOUS

PDF

84.1 KB Created: 2021-03-21 11:00:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7da305ff90cd9e3c46e803f8b48688d SHA-1: d358d7e918b16d6840621f82b17faa62a1c31475 SHA-256: cbbfee3095b6648bd456c8d1dcdf8beeea62388187d96cf929e4bb732b8ee8b1
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a website designed to appear as information about 'aarp medicare part d formulary 2020', likely a lure for phishing or malware distribution. No scripts were extracted, but the presence of external URIs and the ML/ClamAV detections strongly indicate a phishing or trojan delivery attempt.

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://botokaw.ru/wix?keyword=aarp+medicare+part+d+formulary+2020
    • http://fredo.bike/25219293814yk8ig.pdf
    • https://static.s123-cdn-static.com/uploads/4494160/normal_5fcea15070c12.pdf
    • https://cdn-cms.f-static.net/uploads/4412380/normal_602f585a1f9d6.pdf
    • https://cdn-cms.f-static.net/uploads/4448550/normal_603fb6593d3b3.pdf
    • http://sweetmeet.online/wetuseprjfg4.pdf
    • https://cdn-cms.f-static.net/uploads/4376086/normal_5fe962c49ddf2.pdf
    • https://cdn-cms.f-static.net/uploads/4389805/normal_601ddffa8375d.pdf
    • http://o-karte-kopilka.com/17561839412k4caa.pdf
    • https://static.s123-cdn-static.com/uploads/4366660/normal_5ff69c2d97d54.pdf
    • https://static.s123-cdn-static.com/uploads/4370267/normal_5fed2c5c59555.pdf
    • https://cdn-cms.f-static.net/uploads/4451563/normal_6053b0f1e2a84.pdf
    • http://teren.fun/rilujategopunikujugo1nzec.pdf
    • http://pevilolejuwoju.iblogger.org/luwulewiku.pdf
    • https://static.s123-cdn-static.com/uploads/4482206/normal_5fff57b56e6b9.pdf
    • http://tesar-krd.ru/hyderabad_chatal_band_music_mp3_downloadp9pjg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://tewapodu.rf.gd/35124948113.pdf
    • http://volajigatume.epizy.com/47862763871.pdf
    • http://bajivuselome.epizy.com/99663474489.pdf
    • https://s3.amazonaws.com/rujimidujek/76667273808.pdf
    • https://s3.amazonaws.com/paropabaru/nobepiven.pdf
    • https://s3.amazonaws.com/gudukupir/43444094262.pdf
    • https://s3.amazonaws.com/fekazudabo/84711815679.pdf
    • http://magixuzam.epizy.com/xixujurupumatujude.pdf
    • https://s3.amazonaws.com/sowirutelevolur/60116924495.pdf
    • https://s3.amazonaws.com/jixerubowi/kijebojoladubeb.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_off0000fc80.bin
96f6640501d9159a26fd43e01ef0524da4e363f310a1e3971f2276d7c7d85d61		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC80 5264 bytes
font_01_sfnt_off00010e6e.bin
3a9af3d2cfa9edf119c279727c06d837c4fb719628a238d088744245e21a9c29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E6E 11048 bytes
font_02_sfnt_off00013439.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13439 4324 bytes

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