Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fcf8aee7798ea6d…

MALICIOUS

PDF

67.8 KB Created: 2020-11-14 07:41:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: a6cc3579ca87139431f7aeb18815bba4 SHA-1: c957e57cdefb4dfd75ef9f52a91265309f0b4f82 SHA-256: 8fcf8aee7798ea6d6913a4c78bee7cfa5dd6d14f99f3f06d1160938615becc59
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious intent. It contains numerous external URIs, with a primary suspicious URL being https://traffnew.ru/123?utm_term=nombres+de+diosas+mayas. The document's structure and embedded links suggest it functions as a link farm, likely designed to redirect users to phishing sites or download further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?utm_term=nombres+de+diosas+mayas PDF link annotation
    • https://lijipowurop.weebly.com/uploads/1/3/4/3/134314174/12a77c9d.pdfIn PDF document text
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/fagazanula.pdfIn PDF document text
    • https://wilegefozuf.weebly.com/uploads/1/3/4/3/134399327/tivuwelovixomud-fibanep-mexowe-vepopabud.pdfIn PDF document text
    • https://sizojupitad.weebly.com/uploads/1/3/4/3/134332657/94ef94abf.pdfIn PDF document text
    • https://luvepuxoworusoj.weebly.com/uploads/1/3/4/6/134660421/jowiwe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393370/normal_5f948f6c1f149.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/pazerogasarinu/court_street_movie_burton_mi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a5e2ba8-7dba-4114-bba8-cb883a2e7a32/99395810575.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b701a3f7-a0c0-43a7-9029-f5eacc87e162/92824068089.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2e2cd95-9070-402d-affb-1ffd165e6120/35749483852.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a26449a-092f-4c91-b64f-d830b0db2989/38917308080.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/hulu_error_code_504_roku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51f405dd-f65d-4b26-a5b4-7b2ffbc1cac0/runufegosija.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_off0000cafd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAFD 5148 bytes
SHA-256: 06ac797d0727caccc1a8068cf9766c0a8272ce1f2ed4eecf99f7fe5bf692ef03
font_01_sfnt_off0000dc69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC69 11420 bytes
SHA-256: 941acef1e46b2eaa4a2813d5231fb4c2eea99d3bfb7df5240c3b4a532735c206

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