Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f686a076694cd17…

MALICIOUS

PDF

69.3 KB Created: 2020-11-13 21:43:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7fe3bc9d08cc8100922c1193d4adbf82 SHA-1: 1f6d01577f0fc3354285538e39ae5395942b7ea5 SHA-256: 0f686a076694cd17c4f6791e758860a053f354e50c002f5c2b2ea26b5d37a0f8
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an invoice-themed lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/123?utm_term=sdccu+routing+number PDF link annotation
    • https://mewuvirinikupu.weebly.com/uploads/1/3/4/5/134505229/420c313090610aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410447/normal_5f92e6318077e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457590/normal_5fa896f66c97e.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/suximawo/dk_italian-_english_visual_bilingual_dictionary.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/nidasamelogojepol.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/sabimidofi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af1c5d71-0dba-492b-a197-8c053808640b/vevuloba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7de53c86-8534-4159-8c46-51e9eb00d8d2/nodegob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcdf74ab-c9e1-4070-921f-ef570696dd72/what_is_dolby_access.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/arabic_calligraphy_generator_online.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/acts_2_17_commentary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f785269-d946-4430-9750-c534b497fbc2/19487363268.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d10bc270-6b9d-4999-a06d-7cdc62705c15/52749459122.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5b2af0f-9547-42ff-83cc-57cec001b5c0/53974585461.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/somule.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_off0000d308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD308 5084 bytes
SHA-256: 87d8efc35d2704dd4d79c9c0725fbe7003e3ceed77a5ca2a22c46d1876d08546
font_01_sfnt_off0000e43d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE43D 10672 bytes
SHA-256: 53931104999a60744ae565ac90e56d89095492f39789916613b1ec9510c848be

Open this report in the interactive analyzer, or submit your own file for analysis.