Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab8e2dbd4cb6358d…

MALICIOUS

PDF

44.3 KB Created: 2020-05-13 00:06:22 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 76f0496016167200db05a3a128518128 SHA-1: 4da45380c4a030665aa02151a21c369f2a62cd80 SHA-256: ab8e2dbd4cb6358d03da7c06aa069149b56c8edcddec962bd6c6d9fcf97d887e
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. These links point to various PDF files hosted on different domains, suggesting a link farm or SEO manipulation tactic. The document body contains garbled text and embedded URLs, further supporting the link farm hypothesis. No scripts were extracted, and the primary malicious activity appears to be the distribution of these numerous external links.

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://burracing.com/uploads/1/3/1/4/131407179/131407179.html#nhs+bmi+chart+pdf PDF link annotation
    • http://comfortprofessionalsheatingairconditioning.com/uploads/1/3/1/6/131637873/ragukububotapajiw.pdfIn PDF document text
    • http://maderachatter.com/uploads/1/3/0/5/130551898/521e8.pdfIn PDF document text
    • http://158west.com/uploads/1/3/1/6/131606059/lizadexupunuwod.pdfIn PDF document text
    • http://ultimatepaintandtrim.com/uploads/1/3/0/4/130476157/1606341.pdfIn PDF document text
    • http://keepitlocalmontana.com/uploads/1/3/0/8/130874114/f5dabb35900.pdfIn PDF document text
    • http://reasonerstorussia.com/uploads/1/3/0/8/130874634/gawitonemumubebab.pdfIn PDF document text
    • http://ceasefirebusinessassociates.com/uploads/1/3/1/4/131438587/fodaduw-judofewa-kewogitonog-domanukede.pdfIn PDF document text
    • http://jennyperillo.com/uploads/1/3/0/6/130620665/43960eaee.pdfIn PDF document text
    • http://rainbowsandrainboots.org/uploads/1/3/0/2/130272569/gasogusekalusik.pdfIn PDF document text
    • http://elmwoodalloutdoors.com/uploads/1/3/0/2/130272493/11db39f87.pdfIn PDF document text
    • http://theimaginationplace.com/uploads/1/3/1/8/131871849/mutem-sesiralera-zesinozodolu.pdfIn PDF document text
    • http://apptester.site/uploads/1/3/0/5/130588783/902832.pdfIn PDF document text
    • http://broylesvisionofgiving.com/uploads/1/3/0/9/130969747/6053489.pdfIn PDF document text
    • http://harmonfinancialgroup.com/uploads/1/3/0/6/130639948/pevugu_filowivereki.pdfIn PDF document text
    • http://sportingservicesdressage.com/uploads/1/3/0/9/130969418/lafuvezuv_nulasap.pdfIn PDF document text
    • http://mariabraganini.com/uploads/1/3/0/4/130492229/mojimok_dezifapawebelag_sukumulavagoze.pdfIn PDF document text
    • http://karenkelleyperkins.com/uploads/1/3/0/5/130544413/tusadugelikon.pdfIn PDF document text
    • http://banklon.com/uploads/1/3/1/4/131482887/186192.pdfIn PDF document text
    • http://brilliant.domains/uploads/1/3/0/8/130874339/5924966.pdfIn PDF document text
    • http://naomistyleboutique.org/uploads/1/3/0/7/130740420/5487387.pdfIn PDF document text
    • http://theaddcouple.com/uploads/1/3/1/4/131482963/a8cad9142f0e.pdfIn PDF document text
    • http://cmthain.com/uploads/1/3/0/8/130874169/fikik_bapapufuxumuvug_gewilire.pdfIn PDF document text
    • http://chungyenlin.com/uploads/1/3/0/4/130436439/45f1c358d6248ff.pdfIn PDF document text
    • http://pepay.host/uploads/1/3/1/3/131379971/sirulut_kujupovima.pdfIn PDF document text
    • http://balancedmalehealth.com/uploads/1/3/0/4/130483413/4701253.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn 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_off000070a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70A4 6476 bytes
SHA-256: 6b33ff188d28154d6dbdbf812d80b7b44c2f9bc5adfe8bd5e5c9793c1c79fec7
font_01_sfnt_off000080a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80A7 10052 bytes
SHA-256: 1fa020dc6ee681edab3c2601872dfa76e1418b23c3485e42f856c01e3d85d936

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