Malicious PDF — malware analysis report

Static analysis result for SHA-256 dff262f4aea43354…

MALICIOUS

PDF

79.4 KB Created: 2021-03-13 17:45:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 00698dc9019d3b53ffd345ed59db6d71 SHA-1: 919da4a4a9139a2f900dccb93a4a7c1c6980f061 SHA-256: dff262f4aea4335456ef52bb5afdbc80b15dc078d1d75754974f7631eb085642
206 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO spam operation. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://nipisod.ru/wix?keyword=wow+classic+macro+guide+hunter PDF link annotation
    • https://lisesadavageg.weebly.com/uploads/1/3/1/4/131438313/408beef.pdfIn PDF document text
    • http://redirerer.medianewsonline.com/how_to_find_mean_of_frequency_table_on_calculator.pdfIn PDF document text
    • http://copyrightmediahelp.com/940104739712c2t9.pdfIn PDF document text
    • http://maximizator.xyz/57763425739m4k2x.pdfIn PDF document text
    • https://guxenebulofoto.weebly.com/uploads/1/3/2/8/132814975/mixipu.pdfIn PDF document text
    • http://zoompol.xyz/projeto_de_pesquisa_exemplo_prontogfm5e.pdfIn PDF document text
    • http://gisoboxizaza.mygamesonline.org/signs_a_shy_guy_isnt_interested_in_you.pdfIn PDF document text
    • http://pufivuziviv.mypressonline.com/sukarimubidolize.pdfIn PDF document text
    • https://bixixadapi.weebly.com/uploads/1/3/5/3/135321875/cee43740e4402a.pdfIn PDF document text
    • http://dofujifeluradep.medianewsonline.com/fitbit_flex_for_sale.pdfIn PDF document text
    • https://xafusotegemuwif.weebly.com/uploads/1/3/5/3/135304795/gifik_potoxowuv.pdfIn PDF document text
    • https://menesifewo.weebly.com/uploads/1/3/0/8/130814293/e80e4494f.pdfIn PDF document text
    • https://niforowekid.weebly.com/uploads/1/3/1/4/131406966/1913433.pdfIn PDF document text
    • https://mewurotimopu.weebly.com/uploads/1/3/1/3/131381658/7b1ad.pdfIn PDF document text
    • http://monoga.space/cadent_gas_annual_report_2017fc1mx.pdfIn PDF document text
    • http://axacheat4.xyz/1255948344142atr.pdfIn PDF document text
    • https://kijeluve.weebly.com/uploads/1/3/4/2/134266469/dcaf0bfbfadbf8.pdfIn PDF document text
    • https://noromilo.weebly.com/uploads/1/3/4/5/134587763/saselum.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kivarutumo.myartsonline.com/83137439606.pdfIn PDF document text
    • http://tofalit.myartsonline.com/what_does_the_tree_of_life_necklace_represent.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_off0000f433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF433 5460 bytes
SHA-256: fb4d7681f1bab354848b209275f54057f7c2b71cc15f1b611930721e096f9da2
font_01_sfnt_off000106ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106AE 12068 bytes
SHA-256: d16a266e10b9990ca25e58f0b783fa0bb2a41c7e50dd98e099d4e8347e4af5ec

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