Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1b233c60df0c28e…

MALICIOUS

PDF

45.2 KB Created: 2020-03-25 07:48:58 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-25
MD5: 59b919740d908ef3ad46d538bc3ac427 SHA-1: ad7b9b945700c6c73d9ccb719321e7638ac6ca02 SHA-256: f1b233c60df0c28e10114c59e658c0449817d46289ef4eba798553de0c0a38f9
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. The ML_NYX_PDF_MALICIOUS heuristic and the SE_CLOUD_DOC_LURE heuristic indicate a malicious intent, likely to deceive users into clicking on these links. No scripts were extracted, but the sheer volume of links points towards a distribution or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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://mavodafoundation.org/uploads/1/3/0/2/130288458/130288458.html#maguire+et+al+quizlet PDF link annotation
    • http://mordecaimatters.com/uploads/1/3/0/6/130604667/7307014.pdfIn PDF document text
    • http://mta-sts.mail.handsignierte-buecher.net/uploads/1/3/0/6/130621357/b35333c64e93b7.pdfIn PDF document text
    • http://www.emilyvulcano.com/uploads/1/3/0/6/130620936/jijop.pdfIn PDF document text
    • http://propertyhorsei.com/uploads/1/3/0/9/130969813/falanunamo-wowuxifewixan-foxakejorigezax-gafefifixigod.pdfIn PDF document text
    • http://leasepurchasephilahomes.com/uploads/1/3/0/5/130540266/1170576.pdfIn PDF document text
    • http://newbernapp.com/uploads/1/3/0/3/130323424/4961478.pdfIn PDF document text
    • http://martape.com/uploads/1/3/1/0/131070633/belolerozuluwif_sikedarikosem_torafusi.pdfIn PDF document text
    • http://www.elegance-dessert-bar.com/uploads/1/3/0/5/130588394/xanomugax.pdfIn PDF document text
    • http://faith-lift.com/uploads/1/3/0/4/130436458/917f7b.pdfIn PDF document text
    • http://everybodylovesrita.com/uploads/1/3/0/5/130540501/742bbf355337.pdfIn PDF document text
    • http://blackcatsculpture.com/uploads/1/3/0/5/130589286/supun-koniber-gegutufanafowox.pdfIn PDF document text
    • http://therealstage.com/uploads/1/3/0/5/130589049/5384650.pdfIn PDF document text
    • http://kccannabissymposium.org/uploads/1/3/0/3/130323449/38391f.pdfIn PDF document text
    • http://sweetrepeatsfd.com/uploads/1/3/0/3/130323167/pobivomisa-gawerabefaziva-kegasolerote-xedabovena.pdfIn PDF document text
    • http://www.southerncrosfloorsanding.com/uploads/1/3/0/6/130604027/6584035.pdfIn PDF document text
    • http://ontapotteryvillage.xyz/uploads/1/3/0/4/130435611/pemisenukeju_rumexiza.pdfIn PDF document text
    • http://bourkesbestbites.org/uploads/1/3/0/7/130740622/3055344.pdfIn PDF document text
    • http://stjosephelkoym.com/uploads/1/3/0/9/130969973/fupujomanijufiwuwa.pdfIn PDF document text
    • http://semilladecristo.org/uploads/1/3/0/8/130873730/957718dfb0c00.pdfIn PDF document text
    • http://fencingaberdeen.com/uploads/1/3/0/5/130539109/juwapizatubaxob.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 2

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_off000072d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72D0 8124 bytes
SHA-256: 61254413a98cb6f43669aef38a5816c400d9f6f252b94ea3f00e7cf673e72847
font_01_sfnt_off00009258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9258 16036 bytes
SHA-256: 779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63

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