Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f19b35d0853fbf5…

MALICIOUS

PDF

69.3 KB Created: 2020-11-13 04:31:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 06649fe184aa8aa305760bb7726ced1c SHA-1: 734cbcff0dc7710de96cfad31da94c1c10e9aa75 SHA-256: 7f19b35d0853fbf526ecddda16a1cd26cb9f07b1be3c13f3dbc5107a47649ec2
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URL pointing to 'traffnew.ru', which is likely used to deliver a secondary payload or conduct phishing. The document body, though heavily obfuscated, suggests a lure related to a 'snow report'. No scripts were extracted, but the PDF structure itself facilitated the embedding of the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/aws?utm_term=chugach+mountains+snow+report PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405660/normal_5fadd9297d4eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379971/normal_5f9c827aee211.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386597/normal_5f982eb6caea1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448337/normal_5fa1c2447c04f.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
    • https://s3.amazonaws.com/nemafu/zuloxuwobawegabofimosar.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/gawat_janin_fetal_distress.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/63833756015.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/magic_carpet_ride_lyrics_aladdin.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/28493655065.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4243296e-2c99-4bfc-b5d8-3a7d3b049e9f/23217982519.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/93992386814.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/fly_me_to_the_moon_ukulele_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/indian_marriage_biodata_format_download.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/37254744919.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/monofotobixumodozaziju.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_off0000c47a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC47A 5312 bytes
SHA-256: a70f571824d3b2f96330bbd2a3b2dba64c4d6b127e9027341747b259772f8af7
font_01_sfnt_off0000d678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD678 10580 bytes
SHA-256: 5af436d822a9937cc2128671e845f77b665358d9c127e90dabad8fc5cc9cdd67
font_02_sfnt_off0000f9f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F6 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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