Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6c4f48f4b436dc5…

MALICIOUS

PDF

51.4 KB Created: 2020-03-30 13:58:40 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2026-05-08
MD5: 42891396863289996be27e0f34f61212 SHA-1: b6735fab513d10da283ebacfa525be63481967f7 SHA-256: c6c4f48f4b436dc588514ef764ea408508c771700a7624402a02077153f22baf
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, a technique often used for SEO spam or to redirect users to malicious sites. The document body itself contains garbled text and a reference to 'wkhtmltopdf', suggesting it was generated programmatically. The primary attack pattern involves directing users to external URLs such as http://74-123-77-252.mgwnet.com/uploads/1/3/1/4/131453588/131453588.html#que+es+el+diagrama+sagital and http://marabird.com/uploads/1/3/0/8/130874133/5d152.pdf.

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://74-123-77-252.mgwnet.com/uploads/1/3/1/4/131453588/131453588.html#que+es+el+diagrama+sagital PDF link annotation
    • http://marabird.com/uploads/1/3/0/8/130874133/5d152.pdfIn PDF document text
    • http://sociallychallengeddating.com/uploads/1/3/1/3/131384713/geterirawixus_senejelajamom_zesojoneramipof.pdfIn PDF document text
    • http://nexusfoto.com/uploads/1/3/0/6/130621854/561ba24eb7ad6.pdfIn PDF document text
    • http://trademaxinc.com/uploads/1/3/0/8/130874679/153695136944.pdfIn PDF document text
    • http://followingtruenorth.com/uploads/1/3/0/3/130313541/7079788.pdfIn PDF document text
    • http://hartsonridley.com/uploads/1/3/0/4/130435876/3487916.pdfIn PDF document text
    • http://jaredfedgerton.com/uploads/1/3/0/5/130542729/nogezumofonotirupu.pdfIn PDF document text
    • http://shobingg.net/uploads/1/3/0/6/130640072/2ea10.pdfIn PDF document text
    • http://happynursedani.com/uploads/1/3/0/4/130477146/pifuf-xarexawerifozun.pdfIn PDF document text
    • http://alantonpta.org/uploads/1/3/0/6/130639442/nesup.pdfIn PDF document text
    • http://mylittlecutfootcabin.com/uploads/1/3/0/6/130604544/43386.pdfIn PDF document text
    • http://www.martiescatering.com/uploads/1/3/1/3/131380606/pakasobovasaz_japulazafikax.pdfIn PDF document text
    • http://greaterindyretiredista.org/uploads/1/3/0/2/130271185/wopugirev.pdfIn PDF document text
    • http://phablobags.com/uploads/1/3/0/8/130813497/5911047.pdfIn PDF document text
    • http://www.callahancarestutoring.com/uploads/1/3/0/5/130546294/taledolekobon.pdfIn PDF document text
    • http://wyalo.de/uploads/1/3/0/6/130604940/lesugaxomu.pdfIn PDF document text
    • http://ashbaysoap.club/uploads/1/3/0/6/130639885/52e95212f70c2b.pdfIn PDF document text
    • http://mineolatrading.com/uploads/1/3/0/7/130740450/wekubuxafojovixet.pdfIn PDF document text
    • http://nextgenawards2016.com/uploads/1/3/0/5/130550971/811592.pdfIn PDF document text
    • http://azautogalleryllc.com/uploads/1/3/0/7/130738831/newoxan.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_off00008647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8647 9352 bytes
SHA-256: af861c18e228d5ef21d93e0d3b6200b2fd2813d80d6e149b040ed50c76e62963
font_01_sfnt_off0000a841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA841 16376 bytes
SHA-256: 75ad5726b260fca9c3b66ca94450239fbc156c1891091fcfcfab965e4b2051b2

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