Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef384cae45edde73…

MALICIOUS

PDF

68.8 KB Created: 2021-01-04 11:30:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: cf30116d12c7eb525ed4951fcecb5e68 SHA-1: 7328bd624f794313a4045d5603cb0a78649037c0 SHA-256: ef384cae45edde73a163dc05b7858c27489acf0a3c538bc67ebc7030c22fce28
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to 'trafftec.ru'. The document body, though heavily obfuscated, suggests a lure related to 'Gmaps for windows 7', indicating a potential phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature, likely involving a phishing pretext to drive users to the external 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://trafftec.ru/aws?utm_term=gmaps++for+windows+7 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475734/normal_5fd6fc1738437.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382965/normal_5feff777666cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504568/normal_5fd2f28894921.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420756/normal_5fa04668dd67d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411479/normal_5fdad7aad7cae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404738/normal_5f91c5df18362.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://uploads.strikinglycdn.com/files/1719a50a-7fa7-4c5a-9371-df55581c39cf/26093330032.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/area_of_a_trapezoid_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68b42bc0-c070-40aa-b7e6-00cc41f580d5/27916156001.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/terraform_access_denied_status_code_403.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/302a4687-9675-45d7-8fb7-2c4d2fa7e601/rerezelomobodemikevef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ba7b2f5-8a1f-4fba-91a8-a71b5d01e1b2/necchi_sewing_machine_royal_series.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb461ca2-1250-420d-914c-d9c616da1319/49563914029.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_off0000c582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC582 4948 bytes
SHA-256: f6ae378ca1875db50b78f27b1dfcc21d33787c474a61409fb11d8257561371c9
font_01_sfnt_off0000d646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD646 9936 bytes
SHA-256: a987a9344b729dd474a5ad097fcb3f6986a45a7c3d46e9b912dc8e65fe14d77c
font_02_sfnt_off0000f85d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85D 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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