Malicious PDF — malware analysis report

Static analysis result for SHA-256 8629aa847d6ea788…

MALICIOUS

PDF

50.6 KB Created: 2020-06-17 11:44:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: dfe47459dabd06758ab2d21c865e8c04 SHA-1: 4b6dd2808ed38bce408fee58eba15e3cb03c50ea SHA-256: 8629aa847d6ea7881a9529fcbb4bdb36dbe3208afa48081c435a60113c532138
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains a large number of external links, characteristic of a link farm. The embedded URLs point to various domains, suggesting an attempt to manipulate search engine results or distribute malicious content. No scripts were extracted, but the presence of numerous external links indicates a high likelihood of malicious intent.

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://xathletics.org/uploads/1/3/1/6/131606864/131606864.html#deepshine+color+guide PDF link annotation
    • http://ilmcorporation.com/uploads/1/3/0/4/130476143/tofojekuba_wenasefoxino_vadanasizite_dejevosabedopan.pdfIn PDF document text
    • http://yourimmobile.de/uploads/1/3/0/6/130620957/5248184.pdfIn PDF document text
    • http://cpanel.mindfulevolution.net/uploads/1/3/0/6/130603803/nimofuregewijulime.pdfIn PDF document text
    • http://autodiscover.adsongsjingles.com/uploads/1/3/1/4/131455734/zewuvijomi_nowesutofubo_suleva_zakagekob.pdfIn PDF document text
    • http://74-123-79-170.mgwnet.com/uploads/1/3/1/6/131606065/kunibakogefasizori.pdfIn PDF document text
    • http://delindalmccann.com/uploads/1/3/1/3/131380184/porupotoxor.pdfIn PDF document text
    • http://stmarysym.org/uploads/1/3/1/3/131384244/kosez_xopijemefi_bapojuxog.pdfIn PDF document text
    • http://hamiltonenterprisespep.com/uploads/1/3/0/3/130323996/metesun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00008a91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A91 4928 bytes
SHA-256: 6d172d5bf3fa1a0b828e9a49d9f20f8b5547c1a389a0c0c2d11b8dd0f2153258
font_01_sfnt_off00009b3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B3B 10460 bytes
SHA-256: ef2c4b403f71f4dbb63e14794470684d567a63b0ac3099e4a704c4da14cbdaba