Malicious PDF — malware analysis report

Static analysis result for SHA-256 434e930530a2382e…

MALICIOUS

PDF

28.7 KB Created: 2020-06-07 02:41:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-07
MD5: 71c4642223aeb0e43ee9d09f1c3b1508 SHA-1: 6e8174f43708621c263ebf82e7860fd9071e1bf7 SHA-256: 434e930530a2382eb944ccfac497c2ffd1943b72ab2b45737500ca09f7fab3f2
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Phishing:Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains references to these URLs. The primary intent appears to be directing users to a large collection of external PDF files hosted across various domains, likely as part of an SEO poisoning or traffic-driving scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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.
  • 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 http://drqchiro.com/uploads/1/3/0/2/130270832/130270832.html#del+miedo+al+amor+jurgen+klaric+pdf PDF link annotation
    • http://exchange.maroevich.com/uploads/1/3/1/8/131856046/zagegarupawos.pdfIn PDF document text
    • http://mx.badamsart.com/uploads/1/3/0/5/130550938/gubajuve.pdfIn PDF document text
    • http://hamiltonhomecleaners.ca/uploads/1/3/1/3/131380594/dda4d2899dc6.pdfIn PDF document text
    • http://nowicca.com/uploads/1/3/0/7/130776741/nivep-jujopap.pdfIn PDF document text
    • http://weravecbd.com/uploads/1/3/1/3/131383478/fituxumuxu.pdfIn PDF document text
    • http://decheapertrash.com/uploads/1/3/0/4/130435959/bufez.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fusosimube.files.wordpress.com/2020/06/warexabapinonuwad.pdfIn PDF document text
    • https://limimiz.files.wordpress.com/2020/06/desowavi.pdfIn PDF document text
    • https://fapodafa.files.wordpress.com/2020/06/84032404381.pdfIn PDF document text
    • https://womonuxad.files.wordpress.com/2020/06/37672604124.pdfIn PDF document text
    • https://pabozig.files.wordpress.com/2020/06/48739423701.pdfIn PDF document text
    • https://voxidotusad.files.wordpress.com/2020/06/fubezadipuxusukipevibifo.pdfIn PDF document text
    • https://nirigulijax.files.wordpress.com/2020/06/74566733511.pdfIn PDF document text
    • https://xujonajodezo.files.wordpress.com/2020/06/90944425147.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47A9 9692 bytes
SHA-256: 74cc9ca6c2efdb836e5b97a679648352f5775a2bdbc20ae945e14dc569041f09