Malicious PDF — malware analysis report

Static analysis result for SHA-256 534526622acb8e97…

MALICIOUS

PDF

80.7 KB Created: 2021-03-11 14:24:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a22aba62c1938c43cefd9c9b67cf73fd SHA-1: 4ee6454529a6fc6edc5a5e3ef4ef0582c861516e SHA-256: 534526622acb8e978704fb5384efd2aa8e9e7371c67a33402814df8cc6ec1840
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, and 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' confirm malicious intent. The embedded URLs likely serve as lures for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://vilenefex.ru/award?keyword=separador+de+pdfs+online PDF link annotation
    • https://jipotawa.weebly.com/uploads/1/3/6/0/136097183/7031c204.pdfIn PDF document text
    • https://bogizironafek.weebly.com/uploads/1/3/1/4/131406395/7417604.pdfIn PDF document text
    • https://wulukapuw.weebly.com/uploads/1/3/0/7/130740123/1403359.pdfIn PDF document text
    • http://nuxagoliwanep.22web.org/62388882368.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kiboxanemez.rf.gd/64217863614.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/gnar_aram_guide.pdfIn PDF document text
    • https://9d1e48ad-bcd7-4831-9b7b-7108443a63b6.filesusr.com/ugd/136d07_e52b7f260c36403eba2cd1b99b35d835.pdf?index=trueIn PDF document text
    • https://4993f9ff-345c-4c03-a8ec-d4f8dac664d6.filesusr.com/ugd/debbe1_6f0720ffc1164d3b94ef1626a3ebaaea.pdf?index=trueIn PDF document text
    • http://nedajazamofo.epizy.com/tutifisetowedofotone.pdfIn PDF document text
    • https://d992f69e-bc5b-430a-92d7-abfd66d0380b.filesusr.com/ugd/6f7357_ee37a8750a6d49efbe9c7ec69c0109e9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/70408260420.pdfIn PDF document text
    • http://zijowosep.rf.gd/job_application_template_google_docs.pdfIn PDF document text
    • https://a9f3490c-def6-45ea-9957-aefa341d54bd.filesusr.com/ugd/84b587_4e3500033b134a00a79693c1cbda04fa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/lilafar.pdfIn PDF document text
    • http://gonuvatujuj.epizy.com/79110788264.pdfIn PDF document text
    • http://fobapisarut.epizy.com/doxazixezanuv.pdfIn PDF document text
    • https://591e60e9-54e8-4b06-a9a7-f2e0522969d0.filesusr.com/ugd/1fd4b7_b52abe9d02df4b7a873c061a8b661038.pdf?index=trueIn PDF document text
    • https://b81e1767-bb0d-4562-9f98-cfef66859bb1.filesusr.com/ugd/b48b60_7c55ea2cf5ba4bbca3488dcb60fdfa8b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fexuror/pokemon_arceus_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/92691079882.pdfIn PDF document text
    • https://28481333-1ef2-46fb-8ebf-d56c3f24acbc.filesusr.com/ugd/314c35_0fcdae197bd04165ba34345ecd6b6b8a.pdf?index=trueIn PDF document text
    • http://zogeragofas.rf.gd/agni_siragugal_song.pdfIn PDF document text
    • https://4b4ea461-5266-411b-8735-d5290551f550.filesusr.com/ugd/7fedcf_84b57fe373df4f4890d8f2b4ba899808.pdf?index=trueIn 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_off0000f5b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B9 5136 bytes
SHA-256: 2ae8042aefa34b8e5c88cf8dbf677e757c2a6a95a490a8e6bc448bb6648afb1e
font_01_sfnt_off0001073c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1073C 15380 bytes
SHA-256: f2aa5426f60f4a98e27a75a3ecef745606076db935f03b59337b338c92b1b7d0

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