Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ba01d1ef805c3c2…

MALICIOUS

PDF

75.4 KB Created: 2021-03-31 14:51:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 3e6b1e3a65568b0a73112bc77de57027 SHA-1: a49a23a695ec4cfb6d3b2051f4182e98fa26f899 SHA-256: 4ba01d1ef805c3c27ec1227dfc4b8b3aa1550bef0a65ecf1ae2972b46b85cb4f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though obfuscated, appears to be a lure related to search queries, suggesting an attempt to redirect users to malicious sites for further exploitation or phishing. The presence of external URIs and link farm heuristics indicates a strong likelihood of malware distribution or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://resalured.ru/strik?utm_term=what+are+some+non+examples+of+poetry+in+literature PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4480884/normal_60503eb388e83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413347/normal_60288b133f955.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502436/normal_5ff8022e46458.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416319/normal_605c099cd7700.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452599/normal_5fcefc0b3e79d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420924/normal_604656aa9a131.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420761/normal_601a55be12261.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413701/normal_5ffcbe959aa1d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457881/normal_6008d296c4302.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458826/normal_5fe9e0078cfb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455639/normal_60280ab9e1b26.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lipetefafozil.epizy.com/5136736036.pdfIn PDF document text
    • http://mujozitovisiwud.rf.gd/davikamomos.pdfIn PDF document text
    • http://genorokotejivo.rf.gd/bolipujininiweb.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/1891568322.pdfIn PDF document text
    • http://muwojes.epizy.com/24800549644.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/zaxuwasuzetepe.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/visions_of_glory_book_review.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/united_technologies_annual_report_2015.pdfIn PDF document text
    • http://lidiremuvuzanas.rf.gd/85997639497.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/kezabakoguvizirozerum.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_off0000ea0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0B 5324 bytes
SHA-256: 7757fa91840b67a7567fea1955417ad8ffb7fd6e24be4e7069f343f3d50b59cb
font_01_sfnt_off0000fc13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC13 10624 bytes
SHA-256: ac96f654fa30c1d8dcb9f704ece1e637ebbb43299f3ef189061082adf1578bec

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