Malicious PDF — malware analysis report

Static analysis result for SHA-256 dde6e64ed0a8c0f1…

MALICIOUS

PDF

44.9 KB Created: 2020-04-02 16:40:54 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2026-05-08
MD5: 8b8d5d95685def570e68f38328c9332e SHA-1: 5f8565b5626cbebb61cbbcec4e82283bee5fac60 SHA-256: dde6e64ed0a8c0f13bacb8957a6abe73060f373fbbedb654ff5eab8612c1018a
96 Risk Score

Malware Insights

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

The PDF document contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, each hosting a PDF file with a numeric or generic slug. The document body, though partially corrupted, contains text related to a 'mushroom guide' and the wkhtmltopdf tool, suggesting a lure. The primary attack pattern involves directing users to a large farm of external PDFs, likely for SEO manipulation or to distribute further malicious content. No scripts were extracted from this sample.

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://benkregel.com/uploads/1/3/0/2/130272350/130272350.html#northwest+mushroom+guide PDF link annotation
    • http://themajaball.com/uploads/1/3/1/3/131383766/8276768.pdfIn PDF document text
    • http://appbinc.com/uploads/1/3/0/3/130313167/kopuvifidewo_lanisu_lolofimunegegi_dadumaripe.pdfIn PDF document text
    • http://4hartsfarm.com/uploads/1/3/0/3/130313470/wipeka.pdfIn PDF document text
    • http://clearvisionadvertising.com/uploads/1/3/0/4/130478760/e922c091.pdfIn PDF document text
    • http://tehhvinyldesigns.net/uploads/1/3/0/5/130588803/9441348.pdfIn PDF document text
    • http://thegreenhistorian.com/uploads/1/3/0/4/130435766/b514a9.pdfIn PDF document text
    • http://brooksroman.net/uploads/1/3/0/8/130814133/sufusamiminuf_lesotakezomeseb_jobuxigu.pdfIn PDF document text
    • http://somerummage.com/uploads/1/3/0/4/130489172/wobojikofozavupapov.pdfIn PDF document text
    • http://johnjfulfordauthor.com/uploads/1/3/0/3/130313127/rudaridi-janiw-wikutapem.pdfIn PDF document text
    • http://bees-rejuvenating-herbs.com/uploads/1/3/0/3/130313746/7938687.pdfIn PDF document text
    • http://parkstreetguesthousevt.com/uploads/1/3/0/6/130604176/5e430fdcf233.pdfIn PDF document text
    • http://nestandnookdesign.com/uploads/1/3/0/5/130551271/lidavewuzesemuz-zeminawepazava.pdfIn PDF document text
    • http://in2itphotography.com/uploads/1/3/0/9/130969723/db4e5bfd7f9.pdfIn PDF document text
    • http://billionnailsandspa.com/uploads/1/3/0/5/130539702/3587068.pdfIn PDF document text
    • http://taptissparkleto.com/uploads/1/3/0/6/130640081/43113410.pdfIn PDF document text
    • http://nuecescanyonlodge.com/uploads/1/3/1/4/131438018/woluvoj-jutunug-rozobugowe-fozuv.pdfIn PDF document text
    • http://elizabethbukey.com/uploads/1/3/0/6/130605263/fa60d5c1318bd0f.pdfIn PDF document text
    • http://floorcaretoat.com/uploads/1/3/1/0/131070381/sumuwebupukol.pdfIn PDF document text
    • http://ojaivalleymuseum.com/uploads/1/3/0/4/130436426/8bb29d03.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

Related samples 2

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8608 8416 bytes
SHA-256: e0152395be4b2dae6f7597f5e540c4e257543cc14bbcc59d4359a0a7a12d47bc

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