Malicious PDF — malware analysis report

Static analysis result for SHA-256 f54a1ed8eba0d099…

MALICIOUS

PDF

60.8 KB Created: 2020-11-20 02:50:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 31ac763be08394a59675b65fb151d51a SHA-1: 934f8d58fba120061c494dca08e376df74c5df84 SHA-256: f54a1ed8eba0d099e3e153543aebc70c17cb506b9f30ca5a007be50912936e03
244 Risk Score

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. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://cctraff.ru/aws?utm_term=boss+2+bangla+full+movie+hd In PDF document text
    • https://kuwofepex.weebly.com/uploads/1/3/2/7/132740654/7951222.pdfIn PDF document text
    • https://bitexaxa.weebly.com/uploads/1/3/4/4/134477172/vixipob_fuviz_keleziv.pdfIn PDF document text
    • https://miperodijazef.weebly.com/uploads/1/3/4/3/134308013/8205070.pdfIn PDF document text
    • https://xibogunef.weebly.com/uploads/1/3/1/3/131398295/2964e66e93.pdfIn PDF document text
    • https://netaluzubik.weebly.com/uploads/1/3/0/8/130813777/dijazaw_dotibodawuzenob_dazinasopamuv_zorozewozel.pdfIn PDF document text
    • https://bososafevibusup.weebly.com/uploads/1/3/4/0/134041518/5929727.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/523021ed-3d85-40dd-8491-b02396b546d3/fafoxem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23a4e199-b7a6-4c30-80e3-2b4d1ffc516f/47076826119.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/yoruba_god_olorun_smite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87a3774f-2df3-488e-aef9-849e6811fd10/autocad_crack_version.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/download_weed_firm_2_apk.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_off0000b150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB150 5604 bytes
SHA-256: cdf90bc7bc6672a5f2e6611b06e4610967200a20946aab3c8e08749692ad94ec
font_01_sfnt_off0000c44b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC44B 10136 bytes
SHA-256: 7a4bcbf17c8e2ae5ebbc2662ae35b6db68d562ab0e67858cad038b494a345d97