Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ee9216c20722534…

MALICIOUS

PDF

76.8 KB Created: 2021-05-30 06:55:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 1896a564f1f22afee084a77e43772419 SHA-1: 2be0d478e4cd6bc7338651f724bb37478e9a58fd SHA-256: 5ee9216c20722534f75f1b9679b7dbde262758ee5eee2f2286941a4686a13254
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of embedded URLs and the PDF structure indicate an attempt to redirect users to malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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://mezovuduw.ru/strik?utm_term=top+juegos+android+de+pago PDF link annotation
    • https://sapezirotup.weebly.com/uploads/1/3/4/5/134576964/lufefobado.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503390/normal_5fc9dd0201f48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443823/normal_60483d052f9b0.pdfIn PDF document text
    • https://mikugixu.weebly.com/uploads/1/3/1/4/131438693/3792551.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462688/normal_605dc31f30008.pdfIn PDF document text
    • https://vemanilulo.weebly.com/uploads/1/3/4/3/134378365/kugolitajot.pdfIn PDF document text
    • https://tesulufevudo.weebly.com/uploads/1/3/4/4/134491320/zagifebeguzolurip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464302/normal_5fe8eacb72a76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497687/normal_600d638b06cdc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495860/normal_60603efd5010d.pdfIn PDF document text
    • https://ketizinuxemuwiw.weebly.com/uploads/1/3/0/9/130969628/lixava_zurenovu_fumarewu_mitiwow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369501/normal_601e5705f27bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470980/normal_6024a1a5375b7.pdfIn PDF document text
    • https://mawatewif.weebly.com/uploads/1/3/0/9/130969671/depakew-mibabejupenem-jisakile-wovomev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416125/normal_600f654033731.pdfIn PDF document text
    • https://jegupifak.weebly.com/uploads/1/3/4/0/134018348/a100bfeaf3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453906/normal_6017285e27b0f.pdfIn PDF document text
    • https://zaximasuxudaris.weebly.com/uploads/1/3/4/5/134590642/4920345.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/c3f1311f-3492-424b-bc6a-f557140ff27a/why_is_my_acer_computer_not_turning_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85467534-8a7b-4684-ae2a-306a6a909f87/ptv_sports_live_official_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbf2e03b-b6e0-4882-9cd4-42ea574002a9/pubas.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_off0000eac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC5 5120 bytes
SHA-256: f67b6f71eaf5ab236ad8a7d68d84e296ade11586038dfaf8f3e9290770037cb6
font_01_sfnt_off0000fc45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC45 12220 bytes
SHA-256: eb89dfbc7df2a3159f1e73ec21f39c5942014a526b053199a7d28eb2b5565ab0