Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb95ddb9babc9b5e…

MALICIOUS

PDF

79.9 KB Created: 2021-04-01 14:46:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3229ba27e9812e45f1db5b3f38b12201 SHA-1: afc5b57d908a6472f59bd20b5d778447ff496f0a SHA-256: cb95ddb9babc9b5e2e75f183312b9ff644a5ff995f3e699155b637fa258953df
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 high likelihood of malicious intent. It contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The document body, though partially corrupted, suggests a lure related to unit conversion, which is a common pretext for phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dafemum.ru/aws?utm_term=cuanto+es+equivalente+un+pie+en+metros
    • https://cdn-cms.f-static.net/uploads/4495058/normal_5fdb56168232e.pdf
    • https://cdn-cms.f-static.net/uploads/4377116/normal_6019f1f1e9a8a.pdf
    • https://wexisuteki.weebly.com/uploads/1/3/4/6/134616275/wedotituja-zemotokiriwav.pdf
    • https://cdn-cms.f-static.net/uploads/4425010/normal_603fd58346a6e.pdf
    • https://sivisobimiji.weebly.com/uploads/1/3/4/7/134754783/gejidosagi.pdf
    • http://pasikufopubiwo.mypressonline.com/56763142147.pdf
    • https://static.s123-cdn-static.com/uploads/4379970/normal_5fc97d5f506fa.pdf
    • https://cdn-cms.f-static.net/uploads/4466154/normal_6015da2892a7b.pdf
    • https://rozozejowetape.weebly.com/uploads/1/3/4/5/134510424/delosegotofufawixom.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://romakilax.myartsonline.com/african_american_history_workbook.pdf
    • https://7c9e9c40-2b96-4f88-8065-b5ff5e495659.filesusr.com/ugd/3bfcae_bdc7718963c14f4d84548a99d4fe1f93.pdf?index=true
    • http://kedisijusa.onlinewebshop.net/sexugivusebin.pdf
    • http://sibubixusa.epizy.com/3129829145.pdf
    • http://silapopo.epizy.com/simavomuromek.pdf
    • https://uploads.strikinglycdn.com/files/12a99c2b-1a76-4451-91c7-0f8fbf7e32bd/pexewevunixivu.pdf
    • http://gajubadizoduj.epizy.com/brs_behavioral_science_7th_edition_download.pdf
    • https://4ad55601-b8ab-4ae0-bc0e-e90069072326.filesusr.com/ugd/3aca14_d998f80d17344870bd10c68d73244194.pdf?index=true
    • https://uploads.strikinglycdn.com/files/25b40ed3-9f2d-4a5e-b788-d38781c129d6/hp_deskjet_4500_wireless_setup.pdf
    • http://tujetonub.epizy.com/wasivaxaxufeto.pdf
    • https://uploads.strikinglycdn.com/files/4faeb423-8c5a-46f1-a9b3-ac17812bcbff/how_to_study_for_pmp_certification.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_off0000ec6e.bin
db4996cb450ab149082a1b19c085da5ead8786207668a635abd904b77101551b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6E 5056 bytes
font_01_sfnt_off0000fd92.bin
19d1bdbf64983418964afb6e2d7cff69b47be29bdf7650588ba30a0e4308e92e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD92 11712 bytes
font_02_sfnt_off0001244d.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1244D 4324 bytes

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