Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbc9ff8cfb17fcb4…

MALICIOUS

PDF

75.7 KB Created: 2021-06-01 18:11:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 577d96306b281716f7a9c4e2d12e36f8 SHA-1: 606e1d78551cac2da58bec4e25cdfeb3822d4f02 SHA-256: dbc9ff8cfb17fcb47004b731ae532ec57a4146c96a50e843a8cad3ce36f02b08
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'smidgel.ru', which is likely a phishing or malware distribution site. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious external resource, characteristic of phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://smidgel.ru/pbw?utm_term=what+is+behaviourism+in+teaching PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4367950/normal_5fce1613b5084.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466143/normal_5fd0aa3cc7488.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403948/normal_604634e078c21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500889/normal_603afedb7c108.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475728/normal_6017370738458.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393508/normal_6053de2c552c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413473/normal_600db5136e33d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467586/normal_605c73bf15321.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381095/normal_5fed6cb4192c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390999/normal_601e43bed7406.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481064/normal_602df7dbb4e20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461773/normal_60136443aa0fa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd9e0081-ea58-4f7e-9565-e8924a87a150/what_batteries_does_fisher_price_rainforest_swing_take.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fe99418-6eb2-4925-b888-211fedd0ca2d/sharp_aquos_remote_control_codes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cb1db02-0ae0-4158-ab60-5592fa72b224/34926519857.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f81a91ab-e768-407c-86d5-648205baf403/58444842282.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5014567-e835-48fd-9dfc-7534c2c1dd45/the_daily_stoic_book_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8842130-c5d0-45bf-89af-e1c0cb6e8979/pakarutotaparanow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5b3aff5-7943-49c9-b210-dbeb0d68d47a/pl_sql_developer_13_32_bit_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86a3543d-5eeb-4def-988d-9c28d7ae9d81/puzevoxalepaba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dcb5175-0db3-41fb-b43c-3c5c1269c733/72067808113.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94e2f86e-ffb9-466e-9dc9-df9b1884db0a/minecraft_1.16_mushroom_island_seed_java.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e96e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96E 5392 bytes
SHA-256: 386833cf5d0d0403100f3438dd5ec41f3efa553466ea4269fae4d71cf6bad394
font_01_sfnt_off0000fbaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAF 10536 bytes
SHA-256: b70fd44ee53fd5d4c3eb85841803e3bc9395960c476a7b19a52e0080973ec0f1

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