Malicious PDF — malware analysis report

Static analysis result for SHA-256 f00d45af6b650592…

MALICIOUS

PDF

37.2 KB Created: 2020-05-15 15:05:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: a80fab13da363e98f92c5f179bec5379 SHA-1: 2822de1560223f07419004456a567d544403e542 SHA-256: f00d45af6b6505927c9eca654be3bf55c0989e41e3fd14702de5cd5dcc30c904
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, detected by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or SEO poisoning tactic. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to determine the exact payload or intent beyond the link distribution.

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://garysstorage.com/uploads/1/3/1/8/131857527/131857527.html#apache+poi+jar+3.+16 PDF link annotation
    • http://breadchicago.com/uploads/1/3/0/4/130476069/d48c88.pdfIn PDF document text
    • http://thesebastopolestate.com/uploads/1/3/0/8/130813953/7135081.pdfIn PDF document text
    • http://mccft.org/uploads/1/3/0/5/130590282/72bb7e55eea30.pdfIn PDF document text
    • http://lifeandhealthbyhanley.com/uploads/1/3/0/5/130539987/0e916de40f.pdfIn PDF document text
    • http://sleepmattersperth.com/uploads/1/3/1/4/131454466/8834949.pdfIn PDF document text
    • http://kresekbag.net/uploads/1/3/0/5/130539726/riwekivav-fudoreji-muxegi-wokawibedob.pdfIn PDF document text
    • http://brightandbeautifulcleaning.net/uploads/1/3/1/0/131070992/jugodoxanapo-xiropizaz-rimowowuto.pdfIn PDF document text
    • http://sanantoniosalsaon2.com/uploads/1/3/1/0/131070306/palewekuf.pdfIn PDF document text
    • http://researchlearningcommunities.org/uploads/1/3/0/4/130483219/sirasefota-vumuwarelop-jufik.pdfIn PDF document text
    • http://northriverhairandnails.com/uploads/1/3/0/5/130551058/tapameguk.pdfIn PDF document text
    • http://steamologyct.com/uploads/1/3/0/7/130738753/0fbc91d8f.pdfIn PDF document text
    • http://dancaela.com/uploads/1/3/0/5/130550969/veduxobojuxas_kuboravoritaw.pdfIn PDF document text
    • http://katherinetriantafillou.com/uploads/1/3/0/8/130873717/e2036d1c1.pdfIn PDF document text
    • http://mailademann.com/uploads/1/3/1/6/131637583/e39dc06e4a8.pdfIn PDF document text
    • http://teamsaleslink.org/uploads/1/3/1/4/131411197/7473536.pdfIn PDF document text
    • http://home-grown-grace.com/uploads/1/3/1/4/131407980/zisatu_morisinoto.pdfIn PDF document text
    • http://cascadeladyhoops.com/uploads/1/3/0/4/130475877/ximopelononox_gamepajema_viwojo.pdfIn PDF document text
    • http://emmastanleyconsulting.com/uploads/1/3/0/7/130738593/muwibusokisigimujel.pdfIn PDF document text
    • http://keepdreaming.info/uploads/1/3/0/4/130436017/waloxus-dudeb-divifuxegowid.pdfIn PDF document text
    • http://kiew-medical.com/uploads/1/3/0/4/130435929/tofuxonugudidipofi.pdfIn PDF document text
    • http://1stmuserconcertkolkata.com/uploads/1/3/1/0/131070723/078a4e9b.pdfIn PDF document text
    • http://zaraservice.com/uploads/1/3/0/7/130775904/dixogazufu_vunadozamozone_zonapomit.pdfIn PDF document text
    • http://nc-zeitgeist-foundation.org/uploads/1/3/0/6/130620968/3333917.pdfIn PDF document text
    • http://oilsforptsd.com/uploads/1/3/0/6/130620439/4b45da1.pdfIn PDF document text
    • http://pabcharitygolf.com/uploads/1/3/0/8/130873876/7178073.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

Related samples 5

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_off00006559.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6559 10504 bytes
SHA-256: 121f35f1bf7e322e1e981a7c877ad865508e1a665c38f47205149663e103c4bf

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