Malicious PDF — malware analysis report

Static analysis result for SHA-256 30785921a1844347…

MALICIOUS

PDF

55.2 KB Created: 2020-05-14 16:23:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 62f04fae4a23bc8b669883ee7be67828 SHA-1: f6a16273768b4955ef5f9c121a191fef4895768a SHA-256: 30785921a184434736059c8c144975a4387ed7b241c5dc5cc4c1b181c6cea654
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The document body text, though partially corrupted, contains the phrase 'Antivirus para android 2019 gratis', suggesting a lure to download or interact with malicious software. The primary attack pattern involves directing users to a link farm of potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://danielromo.net/uploads/1/3/0/6/130620453/130620453.html#antivirus+para+android+2019+gratis PDF link annotation
    • http://resincontractslimited.com/uploads/1/3/0/7/130739952/magekime_bigukidaj.pdfIn PDF document text
    • http://kenforhighland.com/uploads/1/3/0/2/130289317/5067035.pdfIn PDF document text
    • http://michaelbeurycontracting.com/uploads/1/3/1/6/131606789/vizupif.pdfIn PDF document text
    • http://saintmatthewsfestival.com/uploads/1/3/0/2/130289246/0e38d.pdfIn PDF document text
    • http://richardpeterharrison.com/uploads/1/3/1/4/131454771/4fec4f39634.pdfIn PDF document text
    • http://ladeltaoil.com/uploads/1/3/0/2/130291556/tupubuwo.pdfIn PDF document text
    • http://ourvotenow.org/uploads/1/3/0/9/130969865/pebipilip_medoguvo_nuravomukitum.pdfIn PDF document text
    • http://ljtelectricalcontracting.com/uploads/1/3/0/7/130775055/vurozemos.pdfIn PDF document text
    • http://sidthesasquatch.org/uploads/1/3/0/7/130774981/39c65369fe.pdfIn PDF document text
    • http://makeoverloungebeauty.com/uploads/1/3/1/3/131382680/wosofujetijisat-texipisaf-rozito-jamutijoxesa.pdfIn PDF document text
    • http://coecreator.com/uploads/1/3/0/7/130739876/72f1b.pdfIn PDF document text
    • http://faithplanning.org/uploads/1/3/1/8/131856068/4f14c01629b20.pdfIn PDF document text
    • http://dragonbeautysupply.com/uploads/1/3/0/4/130476183/9060c669b6.pdfIn PDF document text
    • http://befus.ca/uploads/1/3/1/3/131383721/ronafujapofafemagu.pdfIn PDF document text
    • http://7cryptocurrencystrategies.com/uploads/1/3/0/6/130620945/3405471.pdfIn PDF document text
    • http://goodnesslegacy.com/uploads/1/3/0/8/130873776/niliwonidotosem.pdfIn PDF document text
    • http://instantappliancerepair.net/uploads/1/3/0/4/130436494/kasuniwotuvijuj.pdfIn PDF document text
    • http://mypineridgeapartments.com/uploads/1/3/1/1/131164043/xewidapizepimu-wugupejuno-vatugudaten.pdfIn PDF document text
    • http://healingcrystalwirewrapping.com/uploads/1/3/0/9/130969999/7330455.pdfIn PDF document text
    • http://grisorojewelry.com/uploads/1/3/1/8/131872017/446106.pdfIn PDF document text
    • http://prnstaffingsolutions.org/uploads/1/3/1/3/131383733/a825476ef27.pdfIn PDF document text
    • http://divinegiftsofhealing.com/uploads/1/3/1/4/131437160/3469194.pdfIn PDF document text
    • http://jollygoodfellowsclub.org/uploads/1/3/1/0/131070918/3707096.pdfIn PDF document text
    • http://natalieyonehillyer.com/uploads/1/3/1/4/131407698/9001027.pdfIn PDF document text
    • http://rodrigojordan.com/uploads/1/3/1/4/131453588/506d046c54264b.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000088cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88CB 6904 bytes
SHA-256: c1ccedbf72f47b6219e27de0a7a6c3d32c8a4c3a509451b8e73eb1bc96f8e6de
font_01_sfnt_off00009a58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A58 2400 bytes
SHA-256: a1d04cb5b144b696c8b4e7f01e2bb27b145e87d26c3e94e9307634079d047344
font_02_sfnt_off0000a50c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA50C 13528 bytes
SHA-256: 27c08aa361015819ad54ae3ac95014101f79f797e997700263c373f4ff2b1f0d