Malicious PDF — malware analysis report

Static analysis result for SHA-256 a863fd154ebd0bf6…

MALICIOUS

PDF

87.8 KB Created: 2020-03-10 10:12:22 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: ce7e9eb60d3c3d1571e9b51595c18e11 SHA-1: cbcb3d29030d826122c0cd7ba0b6b8dd263b2c89 SHA-256: a863fd154ebd0bf6eb553e5c43f7b910d785216fc455a66a72df87113b4a4900
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of external links, identified as a PDF link farm. The ML classifier strongly indicated maliciousness. The primary purpose appears to be directing users to numerous external websites, likely for SEO manipulation or to host further malicious content. No scripts were extracted, and the document body content is largely obfuscated.

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://glebl.bpmtc.com/uploads/1/3/0/5/130588751/130588751.html#eid+ki+namaz+ka+tarika+in+hindi PDF link annotation
    • http://mouseandcastle.ca/uploads/1/3/0/6/130639406/dapuvuputi.pdfIn PDF document text
    • http://pracin.com/uploads/1/3/0/6/130639593/kivavinizupami-sarejaxinutof-nazijotexe-lujufajazelobo.pdfIn PDF document text
    • http://geras.sk/uploads/1/3/0/7/130776814/44903098062e.pdfIn PDF document text
    • http://jessicabrowndesign.com/uploads/1/3/0/4/130483923/sutib.pdfIn PDF document text
    • http://morethansoulfood.com/uploads/1/3/0/2/130287257/xebipofotikikenipem.pdfIn PDF document text
    • http://rockersandrollers.com/uploads/1/3/0/6/130605159/zosujako.pdfIn PDF document text
    • http://birgitmachtinger.com/uploads/1/3/0/6/130603832/1244072.pdfIn PDF document text
    • http://33135center.com/uploads/1/3/0/8/130874360/9988667.pdfIn PDF document text
    • http://www.maryfcarruthers.com/uploads/1/3/0/6/130604878/bozezevumiwujizop.pdfIn PDF document text
    • http://tesny.site/uploads/1/3/0/3/130324037/4030087.pdfIn PDF document text
    • http://arcc06quebecmetropolitain.com/uploads/1/3/0/3/130313525/bogube-pewerug-monixajivazu.pdfIn PDF document text
    • http://mail.breederseed.com/uploads/1/3/0/6/130620778/bifixapivikofe.pdfIn PDF document text
    • http://northforkinfo.net/uploads/1/3/0/7/130775503/1500642.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn 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
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e49f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE49F 6256 bytes
SHA-256: 45123723b5ac0995c23a6c794e54827310ab047edf31e6fc78b664731786b89c
font_01_sfnt_off0000fd98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD98 1388 bytes
SHA-256: 1723f1ced37cc89d69e30f3df6281c5e5fb8989544fd4587aa75b00c91af2fd0
font_02_sfnt_off00010536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10536 16144 bytes
SHA-256: d71621eb3bff8ac6942496ac6d5049f6da1a7d3b19ff66b7601d0e45ae01c893
font_03_sfnt_off00011a2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A2E 19140 bytes
SHA-256: 45217e6fee0cb984a86132db5cf08ccd9c045786f931f8a80e08da439b10efbe

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