Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffca2c4c2756daff…

MALICIOUS

PDF

75.1 KB Created: 2021-04-09 19:57:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d32756089e986d8830ef642ca74a3e19 SHA-1: bbc042d52571505780e55abb2382337d94c95c30 SHA-256: ffca2c4c2756daffaf9df4685675e13e7ab121b9a85d8c75ffb5754aefd55f58
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is a strong indicator of malicious intent. The ML classifier and ClamAV detection further support this assessment, flagging the file as malicious. The document body, though heavily obfuscated, appears to be a lure related to 'Rheem electric hot water tank specs', suggesting a phishing or malware distribution attempt.

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://jumiwimov.ru/strik?utm_term=rheem+electric+hot+water+tank+specs
    • http://fulokixowo.scienceontheweb.net/66478148356.pdf
    • http://nipobudagese.mypressonline.com/prefix_and_suffix_meaning.pdf
    • https://tovijivesigaz.weebly.com/uploads/1/3/5/3/135327805/4528912.pdf
    • https://sigogaxeba.weebly.com/uploads/1/3/4/6/134620414/075aa59a.pdf
    • https://jevemiparo.weebly.com/uploads/1/3/4/5/134501543/kijaza-pixijijamif-juwuki-ribabuw.pdf
    • https://xixezowipena.weebly.com/uploads/1/3/5/3/135341666/badawiw.pdf
    • http://tebafurunaxinuj.getenjoyment.net/buvexadotoj.pdf
    • http://gagitevanonuti.mywebcommunity.org/xuwam.pdf
    • https://static.s123-cdn-static.com/uploads/4479688/normal_5fe00b82d16e2.pdf
    • https://cdn-cms.f-static.net/uploads/4458618/normal_604ee1f08af1f.pdf
    • http://fanutoragozogow.sportsontheweb.net/87210681330.pdf
    • https://cdn-cms.f-static.net/uploads/4474456/normal_605956f9c6328.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tomamujuf/81747870671.pdf
    • https://c11ab09e-384c-4904-8c79-5ef6f38008df.filesusr.com/ugd/7131a6_7869b1a4580c4381bf40f010d9432bca.pdf?index=true
    • http://sogoxutagejuno.atwebpages.com/vce_designer.pdf
    • https://27dd58ca-3bab-4825-b0a2-cb75a9f796de.filesusr.com/ugd/aba4c5_12ce860785134d8786d35a385fce2ae9.pdf?index=true
    • https://a8a2d6b8-6248-42a0-90a4-e25e421c2e59.filesusr.com/ugd/f63f29_e0e2e8a88d82471480bb686d86529506.pdf?index=true
    • https://s3.amazonaws.com/pasawe/77439397659.pdf
    • https://s3.amazonaws.com/xupovobejanam/samsung_nx3000_lenses.pdf
    • https://s3.amazonaws.com/vekodupiwarobi/tamil_actress_hot_photos_apk.pdf
    • http://kapirexazi.onlinewebshop.net/buvufami.pdf
    • https://s3.amazonaws.com/kotodur/cfa_entry_level_salary_in_canada.pdf
    • https://677f84e8-2a3b-482a-8721-58d714100356.filesusr.com/ugd/086aec_fb05943a76a34f89a269cce11044ea14.pdf?index=true
    • https://18574fdc-dbe8-4f24-a3f7-ab3d6ff540e7.filesusr.com/ugd/d45bfa_a5c3cf0ed3e0477092e3241f44b14709.pdf?index=true
    • 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_off0000e622.bin
8ac95806126f02cbfbf9d3d3c5efda36a3f0a428c332e455ff75f18dc55c6f7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE622 5336 bytes
font_01_sfnt_off0000f82e.bin
2dfd47289243d3ec137ca1674746ab92dccdd45db8194f19b4c2323742efbf11		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF82E 11340 bytes

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