Malicious PDF — malware analysis report

Static analysis result for SHA-256 c51e7cd67e6fa40e…

MALICIOUS

PDF

44.5 KB Created: 2020-04-02 09:01:47 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 182b9f68a04f90b9d6430cd980a991c9 SHA-1: 80cd7c598f78024db183166be9a65c0a8f224217 SHA-256: c51e7cd67e6fa40ee4710669103c20ae6149156f2fe81c54db5b0ef9ded15f5e
96 Risk Score

Malware Insights

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

The PDF document contains a link farm, directing users to numerous external websites with numeric and keyword-based slugs. The primary URL, http://rockoutscholarshipfund.com/uploads/1/3/0/5/130540714/130540714.html#funcionamiento+de+un+diodo+rectificador+polarizado+en+directa, suggests a lure related to electronics, likely to deceive users into visiting potentially malicious sites. The ML classifier strongly supports the malicious nature of this 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://rockoutscholarshipfund.com/uploads/1/3/0/5/130540714/130540714.html#funcionamiento+de+un+diodo+rectificador+polarizado+en+directa PDF link annotation
    • http://hawaiiaerialimaging.com/uploads/1/3/1/0/131070336/jagazokegewigeto.pdfIn PDF document text
    • http://theconsciouscovenonline.com/uploads/1/3/1/4/131437765/6481675.pdfIn PDF document text
    • http://familycarecenterswla.com/uploads/1/3/0/9/130969129/zexabew_zedemifoxas_ropusufalef.pdfIn PDF document text
    • http://rwwarehousesale.com/uploads/1/3/0/7/130738859/gojifonerotof_mipugojej_gifiruluta.pdfIn PDF document text
    • http://k3studiocafe.org/uploads/1/3/1/0/131070805/9634751.pdfIn PDF document text
    • http://silvamusicpublications.com/uploads/1/3/0/4/130477245/tegekemezogus_tebufup_zojebixifuj.pdfIn PDF document text
    • http://rainsjourneyhome.com/uploads/1/3/0/9/130969683/6ec9ad50fa07ad.pdfIn PDF document text
    • http://neonopen.com/uploads/1/3/1/3/131381497/dewuluvapasun-natekapizubu.pdfIn PDF document text
    • http://joannekakatymonzo.com/uploads/1/3/1/1/131164419/jijeguwavebenalisew.pdfIn PDF document text
    • http://oojoandbink.com/uploads/1/3/0/7/130740437/7927008.pdfIn PDF document text
    • http://peacefulchemistry.com/uploads/1/3/1/4/131437740/2345679.pdfIn PDF document text
    • http://a-aon.com/uploads/1/3/1/1/131164246/jipifilemub.pdfIn PDF document text
    • http://yogainsite.com/uploads/1/3/0/5/130550834/b90ed18818ef2.pdfIn PDF document text
    • http://dasbikehaus.com/uploads/1/3/0/6/130639709/7118580.pdfIn PDF document text
    • http://hostmaster.awsmk.co.uk/uploads/1/3/0/8/130813395/terofevunas.pdfIn PDF document text
    • http://commercialpaintersontario.ca/uploads/1/3/0/2/130274032/510171e.pdfIn PDF document text
    • http://mobilebeatzofcolorado.com/uploads/1/3/1/0/131071181/poxevevotada_javok.pdfIn PDF document text
    • http://olismallwood.com/uploads/1/3/0/5/130551491/boramisim-xejenekogitetir-solojukezuxo-kanozifukamoxu.pdfIn PDF document text
    • http://webggmedia.com/uploads/1/3/0/4/130488100/sufasi.pdfIn PDF document text
    • http://erevalue.com/uploads/1/3/0/9/130969188/tarogugifamavi.pdfIn PDF document text
    • http://w2propertymgmt.com/uploads/1/3/0/7/130776877/pilegoxemavom_sawovikabigada_xijorotegifuvow.pdfIn PDF document text
    • http://miyamoto1.com/uploads/1/3/0/8/130873921/77e6b89c864409.pdfIn PDF document text
    • http://libagric.com/uploads/1/3/0/4/130489247/nuzap.pdfIn PDF document text
    • http://a5autostores.com/uploads/1/3/0/7/130775668/9666588.pdfIn PDF document text
    • http://visitthepreserve.org/uploads/1/3/0/7/130775363/1361057.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://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn 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_off000078e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78E5 8204 bytes
SHA-256: 6169001238363e311ef2aabb855fb137a87bf0bf90cf0d7181c500d24ffec0fb
font_01_sfnt_off00009728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9728 2828 bytes
SHA-256: cfb3357b20fb01955c1e4a0ed568c791e3a97db8f0fbaa18432a833eaa1d19da

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