Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3ac70e745d1151b…

MALICIOUS

PDF

53.1 KB Created: 2020-03-23 04:48:53 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-25
MD5: 88f0b249ae36c6b343bd9b0be1bd784a SHA-1: 98d96c73fb960bd572be7d4e86aeafa560949319 SHA-256: f3ac70e745d1151b5ed579b2720bd6defc0fe5a6adce904319f40c1b8113c32f
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains a URL that points to a collection of other PDF files. This suggests the primary purpose is to act as a link farm, potentially for SEO manipulation or to distribute further malicious content through the linked PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://karlhicksmodernwood.com/uploads/1/3/0/6/130605040/130605040.html#operaciones+unitarias+en+tecnologia+de+alimentos PDF link annotation
    • http://michelleveixmccartan.com/uploads/1/3/0/4/130435930/muporaporufoxiv-bupik-wepotejosexorep-badejolekiza.pdfIn PDF document text
    • http://americangreenland.com/uploads/1/3/0/5/130588203/4750857.pdfIn PDF document text
    • http://makingmemorieswithscrapbooking.com/uploads/1/3/0/2/130289021/lekuf_vezuk_gufizudo_vupizanatujalaz.pdfIn PDF document text
    • http://motion-praxis.net/uploads/1/3/0/4/130435685/2204220.pdfIn PDF document text
    • http://shadowplaycabaret.com/uploads/1/3/0/6/130639859/472b5e79d882c0.pdfIn PDF document text
    • http://naftakw.com/uploads/1/3/0/8/130813785/3287675.pdfIn PDF document text
    • http://k1smoghayward.com/uploads/1/3/0/5/130541131/a9840.pdfIn PDF document text
    • http://charissaanggita.com/uploads/1/3/0/7/130776801/xolamupem_liwexura_pununajowol.pdfIn PDF document text
    • http://opensshdownload.com/uploads/1/3/0/3/130379193/5315e2d2.pdfIn PDF document text
    • http://www.ellenhonespottery.com/uploads/1/3/0/4/130476342/60049a34d4f4a6.pdfIn PDF document text
    • http://futurereadytoday.org/uploads/1/3/0/8/130874599/f5fb3aea4.pdfIn PDF document text
    • http://top10online.xyz/uploads/1/3/0/7/130776049/2012902.pdfIn PDF document text
    • http://jamesjersin.com/uploads/1/3/0/7/130738854/1b8728.pdfIn PDF document text
    • http://jakeskyler.com/uploads/1/3/0/5/130589238/8183611.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008ed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ED1 9192 bytes
SHA-256: c8c1fb0897fad30900c1d30db9956ca2ffe966dc3356d4882dac8b5d9d8bee83
font_01_sfnt_off0000af84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF84 16204 bytes
SHA-256: f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d

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