Malicious PDF — malware analysis report

Static analysis result for SHA-256 e27c2766122ab757…

MALICIOUS

PDF

82.1 KB Created: 2021-01-14 12:10:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 808ed643c04c6e7e20d12ebfa210fd87 SHA-1: 729a2d3029018b1794995308a3b024012d59ee90 SHA-256: e27c2766122ab7572ebccda8a772575480baa1b06946897f789cb2ac3057a5e8
104 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. The document body contains urgency language, and an external URI pointing to 'trafficel.ru' was extracted, suggesting a phishing attempt. While no scripts were explicitly extracted, the PDF format can embed JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://trafficel.ru/123?utm_term=nidoqueen+vs+nidoking+let%2527s+go PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4393898/normal_5fcee43f86fdb.pdfIn PDF document text
    • https://cdn.sqhk.co/devisofage/iejithj/47787761637.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377679/normal_5ff92973c492a.pdfIn PDF document text
    • https://bojemesazam.weebly.com/uploads/1/3/4/5/134598919/8566101.pdfIn PDF document text
    • https://site-1168169.mozfiles.com/files/1168169/10604869657.pdfIn PDF document text
    • https://site-1171867.mozfiles.com/files/1171867/vumerirokixisi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383304/normal_5fc5e6d152d4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371010/normal_5fa2df1dc7c96.pdfIn PDF document text
    • https://cdn.sqhk.co/vatuliwa/ZheggQB/recharge_your_metro_card_paytm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493610/normal_5fd994bf6d019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492294/normal_5fe9aeb78b8d3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lowebemuwojiso/uc_browser_for_pc_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/funny_cat_memes_2020_clean.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5D 4940 bytes
SHA-256: abcb43ae34b1d15203621639bcc405eea280b8df1f06157ed5925e2b8068c973
font_01_sfnt_off0000fd56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD56 12168 bytes
SHA-256: ae37669f73417bb469795bb98982800ba7ded3274c1d638876071b962c10c588
font_02_sfnt_off000125d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125D8 16316 bytes
SHA-256: 02c7f89a76d3a9b8e95b26edbb62387e2d0c7f52aa3b909e79dd11d7f0df9289

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