Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a1ac390d28f76d7…

MALICIOUS

PDF

67.8 KB Created: 2020-03-07 16:38:08 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: a88df06beb885340b316d9c7bd2b12d9 SHA-1: f7fa4d2abafd49041a3698e0ab8a4d7638dc6301 SHA-256: 5a1ac390d28f76d778320e8efad8b578d5854aad80454ba6399001edca56e43e
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files. The primary lure appears to be related to 'dainik jagran national edition in hindi pdf download'. The ML classifier strongly indicates maliciousness. The document's purpose is likely to redirect users to a link farm, potentially for SEO manipulation or to host further malicious content, rather than containing a direct exploit.

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://kylaconner.com/uploads/1/3/1/0/131069766/131069766.html#dainik+jagran+national+edition+in+hindi+pdf+download PDF link annotation
    • http://wowsocial.net/uploads/1/3/0/2/130289322/fijat.pdfIn PDF document text
    • http://collectifcontraceptionliege.com/uploads/1/3/0/5/130550800/488791656398b56.pdfIn PDF document text
    • http://mta-sts.wattcreations.com/uploads/1/3/0/4/130483469/7123497.pdfIn PDF document text
    • http://www.maticza.com/uploads/1/3/0/7/130775842/dopiwivamatake.pdfIn PDF document text
    • http://www.k9-lifestyle.com/uploads/1/3/0/4/130488955/fanarita-sevem.pdfIn PDF document text
    • http://onlinecoaching-center.com/uploads/1/3/0/5/130539309/gawidilimitijom.pdfIn PDF document text
    • http://franklinjgreene.com/uploads/1/3/0/4/130476506/0caf6eb41af.pdfIn PDF document text
    • http://amorcocoa.com/uploads/1/3/0/2/130270743/2fad8.pdfIn PDF document text
    • http://www.ecoastelectrical.com/uploads/1/3/0/6/130639221/1085154.pdfIn PDF document text
    • http://mantaraypools.com/uploads/1/3/0/7/130775997/woletuwejirin.pdfIn PDF document text
    • http://nbagauntlet.com/uploads/1/3/0/7/130775688/zitowasiwokepo.pdfIn PDF document text
    • http://roosterpr.agency/uploads/1/3/0/7/130739747/4361924.pdfIn PDF document text
    • http://b21airport.com/uploads/1/3/0/6/130621451/rekudimejepifip_ropejofasulevi.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://jbrandon.people.ua.edu/uploads/1/3/1/0/131070137/7214574.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
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a92e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA92E 7120 bytes
SHA-256: 3cb491b7e67e37326040d02523226bf098af7f79542bd05c073260bcf4a2614d
font_01_sfnt_off0000c588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC588 1388 bytes
SHA-256: 1723f1ced37cc89d69e30f3df6281c5e5fb8989544fd4587aa75b00c91af2fd0
font_02_sfnt_off0000ccee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCEE 18032 bytes
SHA-256: 688d497af1c624f93ae1c4a1de4076b38841ece8a471c5f4e01c0570af8a404a

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