Malicious PDF — malware analysis report

Static analysis result for SHA-256 2473d618da6086f5…

MALICIOUS

PDF

114.4 KB Created: 2021-02-22 14:24:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 527fecf4b87a218419cc7cc52f4ff3f2 SHA-1: 23606cc80bab1df9c94f3dee98142ada721843aa SHA-256: 2473d618da6086f55982c4d7397c5630aff9a2b997a56679f80e4ec90d89a368
96 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains an embedded URL, 'https://bologen.ru/123?utm_term=pandas+select+rows+by+index+value', which is likely used to redirect the user to a malicious site. The document body is heavily obfuscated, but the presence of the URL and the detection signatures strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://bologen.ru/123?utm_term=pandas+select+rows+by+index+value PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450638/normal_600eac7009eb8.pdfIn PDF document text
    • https://cdn.sqhk.co/tejilunuf/31FhfM0/32783085484.pdfIn PDF document text
    • https://cdn.sqhk.co/dikizumi/hicKjgY/colorpics_sneakers_coloring_game_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407299/normal_5fee1d61e5e9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367622/normal_602856ae55649.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456377/normal_5fd63cfd63e1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485435/normal_601a015f1b4f5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501214/normal_600952369fa96.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450438/normal_5feeaf29042d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494138/normal_6023cded16093.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409092/normal_5fc932bd2a8d0.pdfIn PDF document text
    • https://cdn.sqhk.co/lujipalaf/vgdicNk/cryptogram_or_cipher.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401973/normal_6026fbb659501.pdfIn PDF document text
    • https://cdn.sqhk.co/reteduze/ggdoihA/talking_dog_movie.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370080/normal_601419e76780c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389599/normal_6009c31885d70.pdfIn PDF document text
    • https://cdn.sqhk.co/raxuzuvuluf/GjiNeia/desert_battleground_game_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486053/normal_60282e78c1d10.pdfIn PDF document text
    • http://cybety.xyz/realistic_lab_400_partsruts8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xajojunedaxuda.epizy.com/zotoribojilanudo.pdfIn PDF document text
    • http://batefagut.epizy.com/kagaxezexudevele.pdfIn PDF document text
    • http://dosenivejadapi.rf.gd/interview_writing_format_for_students.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000175b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x175B3 5280 bytes
SHA-256: ecc8dc778ef4d521d94769b807a39f8ddfec50ef11462b12d466ec0fc8917990
font_01_sfnt_off000187be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x187BE 11216 bytes
SHA-256: 29cfa8c08449dfa9eb9e0e40892bc4657c0c76d82020a335a74e43d4deb9e954
font_02_sfnt_off0001ad6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD6E 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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